Littérature scientifique sur le sujet « Quantum materials. ARPES. RIXS »

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Articles de revues sur le sujet "Quantum materials. ARPES. RIXS"

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Zhang, Chaofan, Yiwei Li, Ding Pei, Zhongkai Liu, and Yulin Chen. "Angle-Resolved Photoemission Spectroscopy Study of Topological Quantum Materials." Annual Review of Materials Research 50, no. 1 (2020): 131–53. http://dx.doi.org/10.1146/annurev-matsci-070218-121852.

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The recently discovered topological quantum materials (TQMs) have electronic structures that can be characterized by certain topological invariants. In these novel materials, the unusual bulk and surface electrons not only give rise to many exotic physical phenomena but also foster potential new technological applications. To characterize the unusual electronic structures of these new materials, investigators have used angle-resolved photoemission spectroscopy (ARPES) as an effective experimental tool to directly visualize the unique bulk and surface electronic structures of TQMs. In this revi
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Bansil, A., R. S. Markiewicz, S. Sahrakorpi, Hsin Lin, M. Lindroos, and J. Nieminen. "Modeling electronic structure and highly resolved spectroscopies of cuprates: ARPES, RIXS and STM." Physica C: Superconductivity and its Applications 460-462 (September 2007): 222–25. http://dx.doi.org/10.1016/j.physc.2007.03.281.

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Radin, Max, and Alexander Kunitsa. "(Invited) Elucidating Redox Mechanisms in Battery Materials through Resonant Inelastic X-Ray Spectroscopy (RIXS)." ECS Meeting Abstracts MA2024-02, no. 26 (2024): 2085. https://doi.org/10.1149/ma2024-02262085mtgabs.

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Novel battery materials offer the promise of greatly increased energy densities for automative and other applications. However, their practical adoption is often limited by problems in electrochemical performance, such as poor rate capability, voltaic efficiency, and cyclability. Resonant Inelastic X-ray Spectroscopy (RIXS) has become a valuable tool for understanding the redox mechanisms in such materials, representing a first step towards solving problems in electrochemical performance. In many cases, however, the underlying origins of RIXS features are unclear. For example, redox mechanisms
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Xu, R. Z., X. Gu, W. X. Zhao, et al. "Development of a laser-based angle-resolved-photoemission spectrometer with sub-micrometer spatial resolution and high-efficiency spin detection." Review of Scientific Instruments 94, no. 2 (2023): 023903. http://dx.doi.org/10.1063/5.0106351.

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Angle-resolved photoemission spectroscopy with sub-micrometer spatial resolution (μ-ARPES), has become a powerful tool for studying quantum materials. To achieve sub-micrometer or even nanometer-scale spatial resolution, it is important to focus the incident light beam (usually from synchrotron radiation) using x-ray optics, such as the zone plate or ellipsoidal capillary mirrors. Recently, we developed a laser-based μ-ARPES with spin-resolution (LMS-ARPES). The 177 nm laser beam is achieved by frequency-doubling a 355 nm beam using a KBBF crystal and subsequently focused using an optical lens
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Chang, Tay-Rong, Qiangsheng Lu, Xiaoxiong Wang, et al. "Band Topology of Bismuth Quantum Films." Crystals 9, no. 10 (2019): 510. http://dx.doi.org/10.3390/cryst9100510.

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Bismuth has been the key element in the discovery and development of topological insulator materials. Previous theoretical studies indicated that Bi is topologically trivial and it can transform into the topological phase by alloying with Sb. However, recent high-resolution angle-resolved photoemission spectroscopy (ARPES) measurements strongly suggested a topological band structure in pure Bi, conflicting with the theoretical results. To address this issue, we studied the band structure of Bi and Sb films by ARPES and first-principles calculations. The quantum confinement effectively enlarges
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Cao, Y., D. G. Mazzone, D. Meyers, et al. "Ultrafast dynamics of spin and orbital correlations in quantum materials: an energy- and momentum-resolved perspective." Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 377, no. 2145 (2019): 20170480. http://dx.doi.org/10.1098/rsta.2017.0480.

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Many remarkable properties of quantum materials emerge from states with intricate coupling between the charge, spin and orbital degrees of freedom. Ultrafast photo-excitation of these materials holds great promise for understanding and controlling the properties of these states. Here, we introduce time-resolved resonant inelastic X-ray scattering (tr-RIXS) as a means of measuring the charge, spin and orbital excitations out of equilibrium. These excitations encode the correlations and interactions that determine the detailed properties of the states generated. After outlining the basic princip
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Chaluvadi, Sandeep, Debashis Mondal, Chiara Bigi, et al. "Direct-ARPES and STM Investigation of FeSe Thin Film Growth by Nd:YAG Laser." Coatings 11, no. 3 (2021): 276. http://dx.doi.org/10.3390/coatings11030276.

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Research on ultrathin quantum materials requires full control of the growth and surface quality of the specimens in order to perform experiments on their atomic structure and electron states leading to ultimate analysis of their intrinsic properties. We report results on epitaxial FeSe thin films grown by pulsed laser deposition (PLD) on CaF2 (001) substrates as obtained by exploiting the advantages of an all-in-situ ultra-high vacuum (UHV) laboratory allowing for direct high-resolution surface analysis by scanning tunnelling microscopy (STM), synchrotron radiation X-ray photoelectron spectros
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Kitamura, Miho, Seigo Souma, Asuka Honma, et al. "Development of a versatile micro-focused angle-resolved photoemission spectroscopy system with Kirkpatrick–Baez mirror optics." Review of Scientific Instruments 93, no. 3 (2022): 033906. http://dx.doi.org/10.1063/5.0074393.

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Angle-resolved photoemission spectroscopy using a micro-focused beam spot [micro-angle-resolved photoemission spectroscopy (ARPES)] is becoming a powerful tool to elucidate key electronic states of exotic quantum materials. We have developed a versatile micro-ARPES system based on the synchrotron radiation beam focused with a Kirkpatrick–Baez mirror optics. The mirrors are monolithically installed on a stage, which is driven with five-axis motion, and are vibrationally separated from the ARPES measurement system. Spatial mapping of the Au photolithography pattern on Si signifies the beam spot
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Nowak, Kamil, Michał Jurczyszyn, Maciej Chrobak, et al. "Influence of Doping on the Topological Surface States of Crystalline Bi2Se3 Topological Insulators." Materials 15, no. 6 (2022): 2083. http://dx.doi.org/10.3390/ma15062083.

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We present STM/STS, ARPES and magnetotransport studies of the surface topography and electronic structure of pristine Bi2Se3 in comparison to Bi1.96Mg0.04Se3 and Bi1.98Fe0.02Se3. The topography images reveal a large number of complex, triangle-shaped defects at the surface. The local electronic structure of both the defected and non-defected regions is examined by STS. The defect-related states shift together with the Dirac point observed in the undefected area, suggesting that the local electronic structure at the defects is influenced by doping in the same way as the electronic structure of
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Strocov, V. N., F. Lechermann, A. Chikina, et al. "Dimensionality of mobile electrons at x-ray-irradiated LaAlO3/SrTiO3 interfaces." Electronic Structure 4, no. 1 (2022): 015003. http://dx.doi.org/10.1088/2516-1075/ac4e74.

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Abstract Electronic structure of LaAlO3/SrTiO3 (LAO/STO) samples, grown at low oxygen pressure and post-annealed ex situ, was investigated by soft-x-ray ARPES focussing on the Fermi momentum (k F) of the mobile electron system (MES). X-ray irradiation of these samples at temperatures below 100 K creates oxygen vacancies (VOs) injecting Ti t 2g-electrons into the MES. At this temperature the oxygen out-diffusion is suppressed, and the VOs should appear mostly in the top STO layer. The x-ray generated MES demonstrates, however, a pronounced three-dimensional (3D) behavior as evidenced by variati
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Thèses sur le sujet "Quantum materials. ARPES. RIXS"

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Nagi, Reddy Laxman. "Structure électronique des matériaux quantiques pour la technologie quantique." Electronic Thesis or Diss., CY Cergy Paris Université, 2024. http://www.theses.fr/2024CYUN1324.

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Quantum materials exhibit distinctive electronic, magnetic, and optical properties, including topologically protected surface states, strong spin-orbit coupling, and quantum confinement effects. These properties make them promising for next-generation technologies like quantum computing and spintronics.Two different experimental techniques, such as Angle-resolved photoemission spectroscopy (ARPES) and Resonant in-elastic X-ray scattering (RIXS), have been utilized to study the electronic structure of three quantum materials: Hafnium (0001), Monolayer WSe2 on Au, and (Ge(0.87)Mn(0.13)Te.For Haf
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Arab, Arian. "Probing the Surface- and Interface-Sensitive Momentum-Resolved Electronic Structure of Advanced Quantum Materials and Interfaces." Diss., Temple University Libraries, 2019. http://cdm16002.contentdm.oclc.org/cdm/ref/collection/p245801coll10/id/547230.

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Physics<br>Ph.D.<br>In this dissertation, we used a combination of synchrotron-based x-ray spectroscopic techniques such as angle-resolved photoelectron spectroscopy (ARPES), soft x-ray ARPES, hard x-ray photoelectron spectroscopy (HAXPES), and soft x-ray absorption spectroscopy (XAS) to investigate momentum-resolved and angle-integrated electronic structure of advanced three- and two-dimensional materials and interfaces. The results from the experiments were compared to several types of state-of-the-art first-principles theoretical calculations. In the first part of this dissertation we inves
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Bogdanov, Nikolay. "Anisotropic interactions in transition metal oxides: Quantum chemistry study of strongly correlated materials." Doctoral thesis, 2017. https://tud.qucosa.de/id/qucosa%3A30932.

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This thesis covers different problems that arise due to crystal and pseudospin anisotropy present in 3d and 5d transition metal oxides. We demonstrate that the methods of computational quantum chemistry can be fruitfully used for quantitative studies of such problems. In Chapter 2, Chapter 3, and Chapter 7 we show that it is possible to reliably calculate local multiplet splittings fully ab initio, and therefore help to assign peaks in experimental spectra to corresponding electronic states. In a situation of large number of peaks due to low local symmetry such assignment using semi-empirical
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Chapitres de livres sur le sujet "Quantum materials. ARPES. RIXS"

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Yang, Lexian, Haifeng Yang, and Yulin Chen. "Electronic structures of topological quantum materials studied by ARPES." In Semiconductors and Semimetals. Elsevier, 2021. http://dx.doi.org/10.1016/bs.semsem.2021.07.004.

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Kenyon, Ian R. "Electrons in solids." In Quantum 20/20. Oxford University Press, 2019. http://dx.doi.org/10.1093/oso/9780198808350.003.0005.

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Electron energy bands in solids are introduced. Free electron theory for metals is presented: the Fermi gas, Fermi energy and temperature. Electrical and thermal conductivity are interpreted, including the Wiedermann–Franz law. The Hall effect and information it brings about charge carriers is discussed. Plasma oscillations of conduction electrons and the optical properties of metals are examined. Formation of quasi-particles of an electron and its screening cloud are discussed. Electron-electron and electron-phonon scattering and how they affect the mean free path are treated. Then the analys
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Actes de conférences sur le sujet "Quantum materials. ARPES. RIXS"

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Jargot, G., A. Longa, D. Armanno, et al. "TR-ARPES end-station pumped by a mid-IR high repetition rate OPA at ALLS." In Advanced Solid State Lasers. Optica Publishing Group, 2024. https://doi.org/10.1364/assl.2024.aw4a.4.

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The Advanced Laser Light source (ALLS) laboratory provides high-repetition-rate ultrashort light pulses based on ytterbium laser technology. Recently, we have developed a novel time-and-angle-resolved photoemission (TR-ARPES) end-station to explore rapid electron dynamics in quantum materials under intense optical excitation in the near- and mir-infrared range. These intense pulses, generated using our in-house-built optical parametric amplifier (OPA) ranging from 1.6 to 8 µm with a duration of around 100 fs, are fully characterized using the FROSt technique.
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Chaluvadi, S. K., C. Bigi, S. Punathum Chalil, et al. "Enabling Direct-ARPES on nanostructured quantum materials grown by Dual-PLD." In 2023 IEEE Nanotechnology Materials and Devices Conference (NMDC). IEEE, 2023. http://dx.doi.org/10.1109/nmdc57951.2023.10343622.

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Rapports d'organisations sur le sujet "Quantum materials. ARPES. RIXS"

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Wu, Yun. Electronic properties of novel topological quantum materials studied by angle-resolved photoemission spectroscopy (ARPES). Office of Scientific and Technical Information (OSTI), 2016. http://dx.doi.org/10.2172/1409198.

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