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Journal articles on the topic 'Electron-phonon mediated many-body states'

Author: Grafiati

Published: 6 September 2023

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1

Liu, Teng, Peng-Fei Lu, Bi-Ying Hu, et al. "Phonon-mediated many-body quantum entanglement and logic gates in ion traps." Acta Physica Sinica 71, no. 8 (2022): 1. http://dx.doi.org/10.7498/aps.71.20220360.

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The implementation of high-fidelity multi-ion entangled states and quantum gates are the basis for ion trap quantum computing. There are developed quantum gate experimental schemes for realizing multi-ion entanglement and quantum gate, such as Mølmer-Sørensen Gate and Cirac-Zoller Gate; In recent years, there are also ultrafast entanglement gates that operate outside the Lamb-Dicke regime by designing ultrafast pulse sequences. In this typical many-body quantum system, these entanglement gate schemes all couple the spin states between ions by driving the phonon energy level or motion state of

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2

Wen, Zhiyuan, Jiaheng Li, Ziqiang Wang, Yong Xu, and Jing Zhu. "Soft-mode-phonon-mediated insulator–superconductor transition in doped two-dimensional topological insulator RuC." Applied Physics Letters 121, no. 1 (2022): 013102. http://dx.doi.org/10.1063/5.0095044.

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Recently, the search of superconducting materials with topological states has attracted extensive interest due to their exotic properties. By using first-principles calculations, we predict that RuC monolayer is a two-dimensional topological insulator (TI) and shows a TI–superconductor transition under electron doping, leading to a superconducting transition temperature Tc of 1.4 K. Further analysis reveals that the emergence of superconductivity in RuC depends critically on the existence of flatband optical phonons as well as the appearance of multiple electron-pockets and phonon mode softeni

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3

Bastarrachea-Magnani, Miguel Angel, Jannie Thomsen, Arturo Camacho-Guardian, and Georg M. Bruun. "Polaritons in an Electron Gas—Quasiparticles and Landau Effective Interactions." Atoms 9, no. 4 (2021): 81. http://dx.doi.org/10.3390/atoms9040081.

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Two-dimensional semiconductors inside optical microcavities have emerged as a versatile platform to explore new hybrid light–matter quantum states. A strong light–matter coupling leads to the formation of exciton-polaritons, which in turn interact with the surrounding electron gas to form quasiparticles called polaron-polaritons. Here, we develop a general microscopic framework to calculate the properties of these quasiparticles, such as their energy and the interactions between them. From this, we give microscopic expressions for the parameters entering a Landau theory for the polaron-polarit

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4

Elsaesser, Thomas. "Structural dynamics of ionic materials mapped by femtosecond x-ray diffraction." Acta Crystallographica Section A Foundations and Advances 70, a1 (2014): C769. http://dx.doi.org/10.1107/s2053273314092304.

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Relocation of electronic charge plays a key role for functional processes in condensed-phase molecular materials. X-ray diffraction with a femtosecond time resolution allows for spatially resolving transient atomic arrangements and charge distributions [1]. In particular, time-dependent spatial maps of electron density have been derived from x-ray powder diffraction patterns measured with a 100 fs time resolution. In this talk, new results on electron dynamics in transition metal complexes and on field-driven charge relocations in elementary ionic materials will be presented. Crystals containi

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Ding, Hao, Yuwen Hu, Mallika T. Randeria, et al. "Tuning interactions between spins in a superconductor." Proceedings of the National Academy of Sciences 118, no. 14 (2021): e2024837118. http://dx.doi.org/10.1073/pnas.2024837118.

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Novel many-body and topological electronic phases can be created in assemblies of interacting spins coupled to a superconductor, such as one-dimensional topological superconductors with Majorana zero modes (MZMs) at their ends. Understanding and controlling interactions between spins and the emergent band structure of the in-gap Yu–Shiba–Rusinov (YSR) states they induce in a superconductor are fundamental for engineering such phases. Here, by precisely positioning magnetic adatoms with a scanning tunneling microscope (STM), we demonstrate both the tunability of exchange interaction between spi

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Gupta, Anushri, Sanjeev K. Verma, Anita Kumari, and B. D. Indu. "Generalized phonon density of states of La2−xSrxCuO4 cuprate superconductor." International Journal of Modern Physics B 33, no. 28 (2019): 1950328. http://dx.doi.org/10.1142/s0217979219503284.

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Many body quantum dynamics of phonons is steadily developed by considering the various effects of anharmonicities, defects (consider as doping or impurity concentration) and electron–phonon interactions in model Hamiltonian (instead of BCS Hamiltonian) for a high-temperature superconductor (HTS). This enables to obtain the expressions for the renormalized phonon spectrum, the renormalized phonon density of states (RPDOS). The RPDOS can be resolved into diagonal and nondiagonal parts where the nondiagonal component is found highly impurity-dependent. Considering the suitable Born–Mayer–Huggins

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7

HU, BEN YU-KUANG. "MANY-BODY EFFECTS IN FRICTIONAL DRAG BETWEEN COUPLED TWO-DIMENSIONAL ELECTRON SYSTEMS." International Journal of Modern Physics B 13, no. 05n06 (1999): 469–78. http://dx.doi.org/10.1142/s0217979299000369.

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Independently contacted coupled quantum wells separated by barriers which allow significant interlayer interactions but no tunneling have been fabricated. When current is passed through one layer, the interlayer interactions drag carriers in the second layer, resulting in a voltage response (for open circuits). The magnitude of the response gives a quantitative measure of the effective interlayer interactions and response functions of the system, and hence this is an excellent laboratory for the study of many-body phenomena in two-dimensional electron gases. We review the Boltzmann and Kubo fo

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8

Jang, Joonho, Heun Mo Yoo, L. N. Pfeiffer, K. W. West, K. W. Baldwin, and Raymond C. Ashoori. "Full momentum- and energy-resolved spectral function of a 2D electronic system." Science 358, no. 6365 (2017): 901–6. http://dx.doi.org/10.1126/science.aam7073.

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The single-particle spectral function measures the density of electronic states in a material as a function of both momentum and energy, providing central insights into strongly correlated electron phenomena. Here we demonstrate a high-resolution method for measuring the full momentum- and energy-resolved electronic spectral function of a two-dimensional (2D) electronic system embedded in a semiconductor. The technique remains operational in the presence of large externally applied magnetic fields and functions even for electronic systems with zero electrical conductivity or with zero electron

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9

Gupta, Anushri, Sanjeev K. Verma, Anita Kumari, and B. D. Indu. "Impurity induced renormalized phonon spectrum of cuprate superconductors." International Journal of Modern Physics B 32, no. 22 (2018): 1850237. http://dx.doi.org/10.1142/s0217979218502375.

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The potential problem of anharmonic lattice vibrations in high-temperature superconductors (HTS) using the most suitable Born–Mayer–Huggins (BMH) potential has been taken up to investigate the renormalized phonon density of states (RPDOS). In order to develop the suitable results, the many body theory using quantum dynamical approach of Green’s function (GF) via an almost complete Hamiltonian (without using BCS type Hamiltonian) has been incorporated which includes harmonic electron and phonon Hamiltonian, electron–phonon interaction Hamiltonian, anharmonic and defect Hamiltonian. The derivati

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10

Wei, Yao, Francesco Macheda, Zelong Zhao, et al. "High-Temperature Superconductivity in the Lanthanide Hydrides at Extreme Pressures." Applied Sciences 12, no. 2 (2022): 874. http://dx.doi.org/10.3390/app12020874.

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Hydrogen-rich superhydrides are promising high-Tc superconductors, with superconductivity experimentally observed near room temperature, as shown in recently discovered lanthanide superhydrides at very high pressures, e.g., LaH10 at 170 GPa and CeH9 at 150 GPa. Superconductivity is believed to be closely related to the high vibrational modes of the bound hydrogen ions. Here, we studied the limit of extreme pressures (above 200 GPa) where lanthanide hydrides with large hydrogen content have been reported. We focused on LaH16 and CeH16, two prototype candidates for achieving a large electronic c

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11

Mohanty, Vaibhav, and Eric J. Heller. "Lazy electrons in graphene." Proceedings of the National Academy of Sciences 116, no. 37 (2019): 18316–21. http://dx.doi.org/10.1073/pnas.1908624116.

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Within a tight-binding approximation, we numerically determine the time evolution of graphene electronic states in the presence of classically vibrating nuclei. There is no reliance on the Born–Oppenheimer approximation within the p-orbital tight-binding basis, although our approximation is “atomically adiabatic”: the basis p-orbitals are taken to follow nuclear positions. Our calculations show that the strict adiabatic Born–Oppenheimer approximation fails badly. We find that a diabatic (lazy electrons responding weakly to nuclear distortions) Born–Oppenheimer model provides a much more accura

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12

Zhang, Yu. "Non-Adiabatic Dynamics Simulation of Plasmon-Mediated Chemistry." ECS Meeting Abstracts MA2022-01, no. 36 (2022): 1582. http://dx.doi.org/10.1149/ma2022-01361582mtgabs.

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Localized surface plasmon resonances (LSPRs) have attracted much recent attention for their potential in promoting chemical reactions with light. However, the mechanism of LSPR-induced chemical reactions is still not clear and suffers from many controversies. This presentation will discuss the atomic-scale mechanism of plasmonic hot-carrier mediated chemical reaction exampled by H2 dissociation by employing time-dependent density functional calculations theory and non-adiabatic molecular dynamics. The key observation is that there are nested excited states corresponding to both hot-electron ex

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13

Kotzott, Thomas, Mohammed Bouhassoune, Henning Prüser, Alexander Weismann, Samir Lounis, and Martin Wenderoth. "Scanning tunneling spectroscopy of subsurface Ag and Ge impurities in copper." New Journal of Physics 23, no. 11 (2021): 113044. http://dx.doi.org/10.1088/1367-2630/ac3681.

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Abstract We investigate single Ge and Ag impurities buried below a Cu(100) surface using low temperature scanning tunneling microscopy. The interference patterns in the local density of states are surface scattering signatures of the bulk impurities, which result from 3D Friedel oscillations and the electron focusing effect. Comparing the isoelectronic d scatterer Ag and the sp scatterer Ge allows to distinguish contributions from impurity scattering and the host. Energy-independent effective scattering phase shifts are extracted using a plane wave tight-binding model and reveal similar values

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14

CAMACHO B., A. S., and R. M. GUTIERREZ. "COHERENT DYNAMICS OF AN ASYMMETRIC DOUBLE QUANTUM WELL." Surface Review and Letters 09, no. 05n06 (2002): 1623–30. http://dx.doi.org/10.1142/s0218625x02004104.

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Coherent optical effects coming from two excited levels in an engineered asymmetric double quantum well have been detected with duration of picoseconds.1 This short decoherence time is related with the dephasing time. Although dephasing is mainly due to electron–electron scattering and LO phonons in polar semiconductor provide the dominant inelastic scattering mechanism, a study of the elastic scattering with phonons during the coherent stage is also needed to understand the coherent electron dynamics. In this work is presented a microscopic study of the elastic scattering rates due to electro

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15

Wei, Zhi-Yuan, Yong Hu, Ling-Yong Zeng, et al. "Angle-resolved photoemission spectroscopy study on electronic structure of 1<i>T</i>-NbSeTe." Acta Physica Sinica 71, no. 12 (2022): 127901. http://dx.doi.org/10.7498/aps.71.20220458.

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Transition metal dichalcogenides (TMDs) have attracted a lot of interest in condensed matter physics research due to the existence of multiple novel physical phenomena, including superconductivity and charge density wave order. In this sense, TMDs also provide a uniquewindow to study the interactions between different ground states. In this paper, the electronic structure of 1<i>T</i>-NbSeTe has been systematically examined by angle-resolved photoemission spectroscopy (ARPES), for the first time. A van Hove singularity (VHS) has been identified at the <i>M</i> point, wi

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16

Gui, Long, Jamie L. Ebner, Alexander Mileant, James A. Williams, and Kelly K. Lee. "Visualization and Sequencing of Membrane Remodeling Leading to Influenza Virus Fusion." Journal of Virology 90, no. 15 (2016): 6948–62. http://dx.doi.org/10.1128/jvi.00240-16.

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ABSTRACTProtein-mediated membrane fusion is an essential step in many fundamental biological events, including enveloped virus infection. The nature of protein and membrane intermediates and the sequence of membrane remodeling during these essential processes remain poorly understood. Here we used cryo-electron tomography (cryo-ET) to image the interplay between influenza virus and vesicles with a range of lipid compositions. By following the population kinetics of membrane fusion intermediates imaged by cryo-ET, we found that membrane remodeling commenced with the hemagglutinin fusion protein

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17

Peters, William K., David E. Couch, Benoit Mignolet, et al. "Ultrafast 25-fs relaxation in highly excited states of methyl azide mediated by strong nonadiabatic coupling." Proceedings of the National Academy of Sciences 114, no. 52 (2017): E11072—E11081. http://dx.doi.org/10.1073/pnas.1712566114.

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Highly excited electronic states are challenging to explore experimentally and theoretically—due to the large density of states and the fact that small structural changes lead to large changes in electronic character with associated strong nonadiabatic dynamics. They can play a key role in astrophysical and ionospheric chemistry, as well as the detonation chemistry of high-energy density materials. Here, we implement ultrafast vacuum-UV (VUV)-driven electron–ion coincidence imaging spectroscopy to directly probe the reaction pathways of highly excited states of energetic molecules—in this case

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18

Hamada, Kozo, and Katsuhiko Mikoshiba. "IP3 Receptor Plasticity Underlying Diverse Functions." Annual Review of Physiology 82, no. 1 (2020): 151–76. http://dx.doi.org/10.1146/annurev-physiol-021119-034433.

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In the body, extracellular stimuli produce inositol 1,4,5-trisphosphate (IP3), an intracellular chemical signal that binds to the IP3 receptor (IP3R) to release calcium ions (Ca2+) from the endoplasmic reticulum. In the past 40 years, the wide-ranging functions mediated by IP3R and its genetic defects causing a variety of disorders have been unveiled. Recent cryo-electron microscopy and X-ray crystallography have resolved IP3R structures and begun to integrate with concurrent functional studies, which can explicate IP3-dependent opening of Ca2+-conducting gates placed ∼90 Å away from IP3-bindi

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19

Ivády, Viktor, Krisztián Szász, Abram L. Falk, et al. "Optical Nuclear Spin Polarization of Divacancies in SiC." Materials Science Forum 858 (May 2016): 287–90. http://dx.doi.org/10.4028/www.scientific.net/msf.858.287.

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We demonstrate optically pumped dynamic nuclear polarization (DNP) of 29Si nuclear spins that are strongly coupled to paramagnetic color centers in 4H- and 6H-SiC. We observe 99%±1% degree of polarization. By combining ab initio theory with the experimental identification of the color centers’ optically excited states, we quantitatively model how the polarization derives from hyperfine-mediated level anticrossings. In addition, we developed a general model for these optical DNP processes that allows the effects of many microscopic processes to be integrated. Applying this theory, we gain a dee

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20

Zozoulenko, I. V., and K. F. Berggren. "Quantum Transport in Open Nanostructures." VLSI Design 8, no. 1-4 (1998): 179–84. http://dx.doi.org/10.1155/1998/24813.

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Electron transport was studied in an open square quantum dot with a dimension typical for current experiments. A numerical analysis of the probability density distribution inside the dot was performed which enabled us to unambiguously map the resonant states which dominate the conductance of the structure. It was shown that, despite of the presence of dot openings, transport through the dot is effectively mediated by just a few (or even a single) eigenstates of the corresponding closed structure. In a single-mode regime in the leads, the broadening of the resonant levels is typically smaller t

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21

Fetzner, Susanne. "Ring-Cleaving Dioxygenases with a Cupin Fold." Applied and Environmental Microbiology 78, no. 8 (2012): 2505–14. http://dx.doi.org/10.1128/aem.07651-11.

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ABSTRACTRing-cleaving dioxygenases catalyze key reactions in the aerobic microbial degradation of aromatic compounds. Many pathways converge to catecholic intermediates, which are subject toorthoormetacleavage by intradiol or extradiol dioxygenases, respectively. However, a number of degradation pathways proceed via noncatecholic hydroxy-substituted aromatic carboxylic acids like gentisate, salicylate, 1-hydroxy-2-naphthoate, or aminohydroxybenzoates. The ring-cleaving dioxygenases active toward these compounds belong to the cupin superfamily, which is characterized by a six-stranded β-barrel

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22

Hirl, P. J., and R. L. Irvine. "Reductive dechlorination of perchloroethylene using anaerobic sequencing batch biofilm reactors (AnSBBR)." Water Science and Technology 35, no. 1 (1997): 49–56. http://dx.doi.org/10.2166/wst.1997.0010.

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Chlorinated organic solvents, such as perchloroethylene (PCE) and trichloroethylene (TCE), rank in the top five of the groundwater pollutants found in the United States. During the past year, the Anaerobic Sequencing Batch Biofilm Reactor (AnSBBR) was used to select for, enrich, and modify the physiological state of one or more of the many possible microbial consortia that can participate in the reductive dechlorination of PCE. Reactors enriched on lactate or acetate were able to dechlorinate 10.5 mg (63.3 μmoles) of PCE to cis-1,2-dichloroethylene (cDCE) on a daily basis. When methanol was us

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23

Skaling, Barbara, and B. M. MacKinnon. "The absorptive surfaces of Nectonema sp. (Nematomorpha: Nectonematoidea) from Pandalus montagui: histology, ultrastructure, and absorptive capabilities of the body wall and intestine." Canadian Journal of Zoology 66, no. 2 (1988): 289–95. http://dx.doi.org/10.1139/z88-043.

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The histology, ultrastructure, and absorptive capabilities of the body wall and intestine of the juvenile stages of Nectonema sp. (Nematomorpha: Nectonematoidea) that parasitize the shrimp Pandalus montagui in Passamaquoddy Bay, New Brunswick, were examined using histological, histochemical, ultrastructural, and in vitro labeling techniques. The body wall consists of a multilayered cuticle that rests on, and is produced by, a thin cellular hypodermis. The intestinal tract consists of a minute mouth, a cuticularized oesophagus, and a blind-ending intestine consisting of a lumen surrounded at di

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Mathers, Katherine E., and James F. Staples. "Differential posttranslational modification of mitochondrial enzymes corresponds with metabolic suppression during hibernation." American Journal of Physiology-Regulatory, Integrative and Comparative Physiology 317, no. 2 (2019): R262—R269. http://dx.doi.org/10.1152/ajpregu.00052.2019.

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During hibernation, small mammals, including the 13-lined ground squirrel ( Ictidomys tridecemlineatus), cycle between two distinct metabolic states: torpor, where metabolic rate is suppressed by >95% and body temperature falls to ~5°C, and interbout euthermia (IBE), where both metabolic rate and body temperature rapidly increase to euthermic levels. Suppression of whole animal metabolism during torpor is paralleled by rapid, reversible suppression of mitochondrial respiration. We hypothesized that these changes in mitochondrial metabolism are regulated by posttranslational modifications to

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Ramkumar, Govindaraju, Muthugoundar Subramanian Shivakumar, Mohammed Ali Alshehri, Chellasamy Panneerselvam, and Samy Sayed. "Larvicidal potential of Cipadessa baccifera leaf extract-synthesized zinc nanoparticles against three major mosquito vectors." Green Processing and Synthesis 11, no. 1 (2022): 757–65. http://dx.doi.org/10.1515/gps-2022-0071.

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Abstract Mosquitoes are important vectors, which transmit many communicable diseases throughout the world. Synthetic insecticides, such as organophosphate and pyrethroids, are commonly used for their control in the vector control program. Insecticidal compounds from natural sources, notably from plants and synthesized nanoparticles (NPs) are promising tools for managing such vectors. Hence, the study aimed to analyze the insecticidal potentiality of leaf extract of Cipadessa baccifera and synthesized ZnNPs against three major mosquito vectors. The results recorded from UV-Vis spectroscopy show

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Hajjar, Katherine A., Jia Ruan, Guangzhi Sui, et al. "Annexin 2 Mediates Plasminogen-Related Recruitment of Neovascular Mural Cells in Lymphoma Angiogenesis." Blood 110, no. 11 (2007): 3708. http://dx.doi.org/10.1182/blood.v110.11.3708.3708.

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Abstract Malignant tumor progression requires the development of tumor-associated blood vessels through co-option of nearby host vascular cells, recruitment of marrow-derived progenitor cells, or both. The annexin 2 (A2)/p11 heterotetramer is a cell surface co-receptor for the fibrinolytic proteins plasminogen (Plg) and tPA, and strongly augments the catalytic efficiency of vascular cell plasmin generation. We showed previously that A2−/ − mice display impaired postnatal angiogenesis in the corneal pocket, oxygen-induced retinopathy, and Matrigel plug assays. Here, we examined neovascularizati

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Hiraishi, Masaya, Md Abdul Masum, Takashi Namba, et al. "Histopathological changes in tear-secreting tissues and cornea in a mouse model of autoimmune disease." Experimental Biology and Medicine 245, no. 12 (2020): 999–1008. http://dx.doi.org/10.1177/1535370220928275.

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The tear film covers the cornea, and its abnormalities (including immunological) induce dry eye. Using autoimmune disease model mice, BXSB/MpJ- Yaa (BXSB-Yaa), histopathological changes in the eye and tear-secreting tissues were examined using histopathology, immunohistochemistry, and electron microscopy at 8, 20, and 28 weeks for early, middle, and late disease stages. Early and middle stage BXSB-Yaa showed increased serum autoantibody and spleen weight-to-body weight (S/B) ratio, respectively, and higher tear volume than controls, BXSB/MpJ (BXSB), at early stages, which decreased with ageing

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Zhou, Yafu, Gen Li, Guijun Han, et al. "Developmental Programmed Cell Death Involved in Ontogenesis of Dictamnus dasycarpus Capitate Glandular Hairs." Plants 12, no. 2 (2023): 395. http://dx.doi.org/10.3390/plants12020395.

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Plant glandular trichomes have received much attention due to their commercial and biological value. Recent studies have focused on the development of various glands in plants, suggesting that programmed cell death (PCD) may play an important role during the development of plant secretory structures. However, the development processes and cytological characteristics in different types of plant secretory structures differed significantly. This study aims to provide new data on the developmental PCD of the capitate glandular hairs in Dictamnus dasycarpus. Light, scanning, immunofluorescence labe

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Bachman, Ridge M., Derek M. Hall, and Ljubisa R. Radovic. "A DFT Study of the VRFB Positive Electrode: Carbon Active Sites for the VO₂ ⁺/VO²⁺ Reaction." ECS Meeting Abstracts MA2022-01, no. 48 (2022): 2008. http://dx.doi.org/10.1149/ma2022-01482008mtgabs.

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The vanadium redox flow battery (VRFB) is a promising candidate for use in grid-scale battery applications to support a deeper reliance on intermittent renewable energy. However, it suffers from a sluggish redox reaction at the positive electrode. Previous studies indicate that its performance can be improved by oxidizing a graphene-based carbon electrode and thus increasing the concentration of its oxygen-containing surface sites. While such performance enhancement does not appear to be controversial, the underlying mechanisms is far from being clear. Some authors suggest that this procedure

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Schäfer, Angela Maria, Martin Kemler, Robert Bauer, and Dominik Begerow. "The illustrated life cycle of Microbotryum on the host plant Silene latifolia." Botany 88, no. 10 (2010): 875–85. http://dx.doi.org/10.1139/b10-061.

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The plant-parasitic genus Microbotryum (Pucciniomycotina) has been used as a model for various biological studies, but fundamental aspects of its life history have not been documented in detail. The smut fungus is characterized by a dimorphic life cycle with a haploid saprophytic yeast-like stage and a dikaryotic plant-parasitic stage, which bears the teliospores as dispersal agents. In this study, seedlings and flowers of Silene latifolia Poir. (Caryophyllaceae) were inoculated with teliospores or sporidial cells of Microbotryum lychnidis-dioicae (DC. ex Liro) G. Deml & Oberw. and the ger

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Keller, Nadine, Arunasalam Naguleswaran, Angela Cannas, et al. "Identification of a Neospora caninum Microneme Protein (NcMIC1) Which Interacts with Sulfated Host Cell Surface Glycosaminoglycans." Infection and Immunity 70, no. 6 (2002): 3187–98. http://dx.doi.org/10.1128/iai.70.6.3187-3198.2002.

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ABSTRACT The invasive stages of apicomplexan parasites enter their host cells through mechanisms which are largely conserved throughout the phylum. Host cell invasion is divided into two distinct events, namely, adhesion onto the host cell surface and the actual host cell entry process. The former is mediated largely through microneme proteins which are secreted at the onset of establishing contact with the host cell surface. Many of the microneme proteins identified so far contain adhesive domains. We here present the genomic and corresponding cDNA sequences coding for a 460-amino-acid (aa) m

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Bradner, James E., Edward F. Greenberg, Stuart L. Schreiber, and Ralph Mazitschek. "Design and Characterization of a Novel, Reverse Prodrug Histone Deacetylase Inhibitor for Cutaneous T-Cell Lymphoma." Blood 108, no. 11 (2006): 4759. http://dx.doi.org/10.1182/blood.v108.11.4759.4759.

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Abstract Cutaneous T-Cell Lymphoma (CTCL) comprises a group of related lymphoproliferative disorders characterized by the presence of malignant lymphocytes in the skin. The most common variant is Mycosis Fungoides (MF), which affects approximately 500 patients per year in the United States. Though most patients with MF enjoy a normal life expectancy, they experience chronic morbidity due to the symptomatic and cosmetic manifestations of epidermotropism: erythematous patches, elevated plaques, alopecia, and cellulitis. Many patients will experience progressive disease with lymph node infiltrati

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Tian, Wei, Xing Jun Li, Natalie D. Stull та ін. "The Phosphoinositide-Binding Protein p40phox Regulates NADPH Oxidase Activation Rather Than Assembly during FcγIIA Receptor-Induced Phagocytosis." Blood 108, № 11 (2006): 678. http://dx.doi.org/10.1182/blood.v108.11.678.678.

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Abstract Many critical features of the organization and regulation of the phagocyte NADPH oxidase, a complex multi-subunit enzyme that generates superoxide for microbial killing, remain poorly defined. The active enzyme includes a membrane-bound flavocytochrome b along with p47phox, p67phox, p40phox, and Rac-GTP that are present in the cytosol of resting cells. p67phox is linked by high affinity interactions with both p47phox and p40phox, which appear to translocate as a trimeric complex upon cellular activation. The p47phox subunit acts as an adaptor to promote translocation by docking at a p

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Kinzel, Niklas Werner, Derya Demirbas, Eckhard Bill, et al. "Systematic Variation of 3d Metals in a Redox-Innocent Ligand Environment: Structures, Electrochemical Properties and CO₂ Activation." ECS Meeting Abstracts MA2022-01, no. 49 (2022): 2078. http://dx.doi.org/10.1149/ma2022-01492078mtgabs.

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In the endeavor to close the anthropogenic carbon cycle and produce goods in a de-fossilized future, electrochemical carbon dioxide reduction constitutes a powerful tool.[1] Herein,3d transition metal complexes range among the most effective catalysts to overcome the kinetic barriers for CO2 activation.[2] In a recent literature review, we analyzed the main reaction pathways of homogeneously catalyzed CO2 electroreduction from an organometallic perspective and classified them into two mechanisms: (1) direct coordination of carbon dioxide to the metal center prior to activation and (2) formatio

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Wang, Wenqing, Andrew Devilbiss, Thomas Mathews, et al. "Reticular Dysgenesis-Associated Adenylate Kinase 2 Deficiency Impairs Hematopoietic Stem and Progenitor Cell Function through Reductive Stress." Blood 136, Supplement 1 (2020): 33. http://dx.doi.org/10.1182/blood-2020-138560.

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Energy deficiency and redox stress are hallmarks of mitochondrial pathology. Reductive stress is marked by an accumulation of reducing species and can arise from defects in the electron transport chain (ETC) that prevent NAD+ regeneration from NADH. Reticular Dysgenesis (RD) is a particularly grave form of severe combined immunodeficiency (SCID), characterized by maturation arrest of both myeloid and lymphoid lineages. Unlike other forms of SCID, RD is a mitochondriopathy caused by biallelic mutations in the mitochondrial enzyme adenylate kinase 2 (AK2). AK2 catalyzes the phosphorylation of ad

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Lewandowski, Cyprian, Stevan Nadj-Perge, and Debanjan Chowdhury. "Does filling-dependent band renormalization aid pairing in twisted bilayer graphene?" npj Quantum Materials 6, no. 1 (2021). http://dx.doi.org/10.1038/s41535-021-00379-6.

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AbstractMagic-angle twisted bilayer graphene (MATBG) exhibits a panoply of many-body phenomena that are intimately tied to the appearance of narrow and well-isolated electronic bands. The microscopic ingredients that are responsible for the complex experimental phenomenology include electron–electron (phonon) interactions and nontrivial Bloch wavefunctions associated with the narrow bands. Inspired by recent experiments, we focus on two independent quantities that are considerably modified by Coulomb interaction-driven band renormalization, namely the density of states and the minimal spatial

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Adhikary, Priyo, and Tanmoy Das. "Novel attractive pairing interaction in strongly correlated superconductors." SciPost Physics 7, no. 6 (2019). http://dx.doi.org/10.21468/scipostphys.7.6.078.

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Conventional and unconventional superconductivity, respectively, arise from attractive (electron-phonon) and repulsive (many-body Coulomb) interactions with fixed-sign and sign-reversal pairing symmetries. Although heavy-fermions, cuprates, and pnictides are widely believed to be unconventional superconductors, recent evidence in one of the heavy fermion superconductor (CeCu_22Si_22) indicate the presence of a novel conventional type pairing symmetry beyond the electron-phonon coupling. We present a new mechanism of attractive potential between electrons, mediated by emergent boson fields (vac

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Patton, Kelly R. "Interaction mediated electron transport within the many-body tunnelling Hamiltonian." Physica Scripta, May 17, 2023. http://dx.doi.org/10.1088/1402-4896/acd667.

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Abstract For a non-superconducting system and in the spirit of the transfer or tunnelling Hamiltonian formalism, an expression for the electronic tunnelling current through an insulating barrier is calculated, explicitly taking into account the effects of electron-electron interactions that can persist across the barrier. In the presence of a single tunnelling barrier, the exact Hamiltonian is projected onto the subspaces of the “left” and “right” conducting leads. In the weak-tunnelling limit, the well- known tunnelling Hamiltonian is recovered, along with an additional term. This additional

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Belvin, Carina A., Edoardo Baldini, Ilkem Ozge Ozel, et al. "Exciton-driven antiferromagnetic metal in a correlated van der Waals insulator." Nature Communications 12, no. 1 (2021). http://dx.doi.org/10.1038/s41467-021-25164-8.

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AbstractCollective excitations of bound electron-hole pairs—known as excitons—are ubiquitous in condensed matter, emerging in systems as diverse as band semiconductors, molecular crystals, and proteins. Recently, their existence in strongly correlated electron materials has attracted increasing interest due to the excitons’ unique coupling to spin and orbital degrees of freedom. The non-equilibrium driving of such dressed quasiparticles offers a promising platform for realizing unconventional many-body phenomena and phases beyond thermodynamic equilibrium. Here, we achieve this in the van der

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Mareev, Evgenii, and Fedor Potemkin. "Dynamics of ultrafast phase transitions in MgF2 triggered by laser-induced THz coherent phonons." Scientific Reports 12, no. 1 (2022). http://dx.doi.org/10.1038/s41598-022-09815-4.

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AbstractThe advent of free-electron lasers opens new routes for experimental high-pressure physics, which allows studying dynamics of condensed matter with femtosecond resolution. A rapid compression, that can be caused by laser-induced shock impact, leads to the cascade of high-pressure phase transitions. Despite many decades of study, a complete understanding of the lattice response to such a compression remains elusive. Moreover, in the dynamical case (in contrast to quasi-static loading) the thresholds of phase transitions can change significantly. Using the third harmonic pump–probe techn

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Zhou, Ling, Junwei Huang, Lukas Windgaetter, et al. "Unconventional excitonic states with phonon sidebands in layered silicon diphosphide." Nature Materials, June 16, 2022. http://dx.doi.org/10.1038/s41563-022-01285-3.

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AbstractComplex correlated states emerging from many-body interactions between quasiparticles (electrons, excitons and phonons) are at the core of condensed matter physics and material science. In low-dimensional materials, quantum confinement affects the electronic, and subsequently, optical properties for these correlated states. Here, by combining photoluminescence, optical reflection measurements and ab initio theoretical calculations, we demonstrate an unconventional excitonic state and its bound phonon sideband in layered silicon diphosphide (SiP2), where the bound electron–hole pair is

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42

Hader, Joerg, Josefine Neuhaus, Jerome V. Moloney, and Stephan W. Koch. "On the importance of electron-electron and electron-phonon scatterings and energy renormalizations during carrier relaxation in monolayer transition-metal dichalcogenides." Journal of Physics: Condensed Matter, April 22, 2022. http://dx.doi.org/10.1088/1361-648x/ac699e.

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Abstract An ab initio based fully microscopic many-body approach is used to study the carrier relaxation dynamics in monolayer transition-metal dichalcogenides. Bandstructures and wavefunctions as well as phonon energies and coupling matrix elements are calculated using density functional theory. The resulting dipole and Coulomb matrix elements are implemented in the Dirac-Bloch equations to calculate carrier-carrier and carrier-phonon scatterings throughout the whole Brillouin zone. It is shown that carrier scatterings lead to a relaxation into hot quasi-Fermi distributions on a single femtos

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Walczak, Kamil. "Decoherence in elastic and polaronic transport via discrete quantum states." Open Physics 4, no. 2 (2006). http://dx.doi.org/10.2478/s11534-006-0009-y.

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AbstractIn this work we study the effect of decoherence on elastic and polaronic transport via discrete quantum states. Calculations are performed with the help of a nonperturbative computational scheme, based on Green’s function theory within the framework of polaron transformation (GFT-PT), where the many-body electron-phonon interaction problem is mapped exactly into a single-electron multi-channel scattering problem. In particular, the influence of dephasing and relaxation processes on the shape of the electrical current and shot noise curves is discussed in detail under linear and nonline

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Magoni, Matteo, Paolo Mazza, and Igor Lesanovsky. "Phonon dressing of a facilitated one-dimensional Rydberg lattice gas." SciPost Physics Core 5, no. 3 (2022). http://dx.doi.org/10.21468/scipostphyscore.5.3.041.

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We study the dynamics of a one-dimensional Rydberg lattice gas under facilitation (anti-blockade) conditions which implements a so-called kinetically constrained spin system. Here an atom can only be excited to a Rydberg state when one of its neighbors is already excited. Once two or more atoms are simultaneously excited mechanical forces emerge, which couple the internal electronic dynamics of this many-body system to external vibrational degrees of freedom in the lattice. This electron-phonon coupling results in a so-called phonon dressing of many-body states which in turn impacts on the fac

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Merkl, Philipp, Chaw-Keong Yong, Marlene Liebich, et al. "Proximity control of interlayer exciton-phonon hybridization in van der Waals heterostructures." Nature Communications 12, no. 1 (2021). http://dx.doi.org/10.1038/s41467-021-21780-6.

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AbstractVan der Waals stacking has provided unprecedented flexibility in shaping many-body interactions by controlling electronic quantum confinement and orbital overlap. Theory has predicted that also electron-phonon coupling critically influences the quantum ground state of low-dimensional systems. Here we introduce proximity-controlled strong-coupling between Coulomb correlations and lattice dynamics in neighbouring van der Waals materials, creating new electrically neutral hybrid eigenmodes. Specifically, we explore how the internal orbital 1s-2p transition of Coulomb-bound electron-hole p

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Kounalakis, Marios, Yaroslav M. Blanter, and Gary A. Steele. "Synthesizing multi-phonon quantum superposition states using flux-mediated three-body interactions with superconducting qubits." npj Quantum Information 5, no. 1 (2019). http://dx.doi.org/10.1038/s41534-019-0219-y.

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AbstractMassive mechanical resonators operating at the quantum scale can enable a large variety of applications in quantum technologies as well as fundamental tests of quantum theory. Of crucial importance in that direction is both their integrability into state-of-the-art quantum platforms as well as the ability to prepare them in generic quantum states using well-controlled high-fidelity operations. Here, we propose a scheme for controlling a radio-frequency mechanical resonator at the quantum scale using two superconducting transmon qubits that can be integrated on the same chip. Specifical

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Aggoune, Wahib, Alberto Eljarrat, Dmitrii Nabok, et al. "A consistent picture of excitations in cubic BaSnO3 revealed by combining theory and experiment." Communications Materials 3, no. 1 (2022). http://dx.doi.org/10.1038/s43246-022-00234-6.

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AbstractAmong the transparent conducting oxides, the perovskite barium stannate is most promising for various electronic applications due to its outstanding carrier mobility achieved at room temperature. However, most of its important characteristics, such as band gaps, effective masses, and absorption edge, remain controversial. Here, we provide a fully consistent picture by combining state-of-the-art ab initio methodology with forefront electron energy-loss spectroscopy and optical absorption measurements. Valence electron energy-loss spectra, featuring signals originating from band gap tran

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Lin, Kai-Qiang, Chin Shen Ong, Sebastian Bange, et al. "Narrow-band high-lying excitons with negative-mass electrons in monolayer WSe2." Nature Communications 12, no. 1 (2021). http://dx.doi.org/10.1038/s41467-021-25499-2.

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AbstractMonolayer transition-metal dichalcogenides (TMDCs) show a wealth of exciton physics. Here, we report the existence of a new excitonic species, the high-lying exciton (HX), in single-layer WSe2 with an energy of ~3.4 eV, almost twice the band-edge A-exciton energy, with a linewidth as narrow as 5.8 meV. The HX is populated through momentum-selective optical excitation in the K-valleys and is identified in upconverted photoluminescence (UPL) in the UV spectral region. Strong electron-phonon coupling results in a cascaded phonon progression with equidistant peaks in the luminescence spect

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Cai, Min, Mao-Peng Miao, Yunfan Liang, et al. "Manipulating single excess electrons in monolayer transition metal dihalide." Nature Communications 14, no. 1 (2023). http://dx.doi.org/10.1038/s41467-023-39360-1.

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AbstractPolarons are entities of excess electrons dressed with local response of lattices, whose atomic-scale characterization is essential for understanding the many body physics arising from the electron-lattice entanglement, yet difficult to achieve. Here, using scanning tunneling microscopy and spectroscopy (STM/STS), we show the visualization and manipulation of single polarons in monolayer CoCl2, that are grown on HOPG substrate via molecular beam epitaxy. Two types of polarons are identified, both inducing upward local band bending, but exhibiting distinct appearances, lattice occupatio

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Qu, Dai-Wei, Bin-Bin Chen, Hong-Chen Jiang, Yao Wang, and Wei Li. "Spin-triplet pairing induced by near-neighbor attraction in the extended Hubbard model for cuprate chain." Communications Physics 5, no. 1 (2022). http://dx.doi.org/10.1038/s42005-022-01030-x.

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AbstractIn quantum materials, the electronic interaction and the electron-phonon coupling are, in general, two essential ingredients, the combined impact of which may drive exotic phases. Recently, an anomalously strong electron-electron attraction, likely mediated by phonons, has been proposed in one-dimensional copper-oxide chain Ba2−xSrxCuO3+δ. Yet, it is unclear how this strong near-neighbor attraction V influences the superconductivity pairing in the system. Here we perform accurate many-body calculations to study the extended Hubbard model with on-site Coulomb repulsion U > 0 and near

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