Relevant bibliographies by topics / Ultrafast current

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Ultrafast current'

Author: Grafiati
Published: 22 February 2025
Last updated: 31 July 2025

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Journal articles on the topic "Ultrafast current"

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Lu Wen-Tian, Yao Chun-Wei, YAN Zhi, and YUAN Zhe. "Ultrafast Spin Dynamics Research on Laser-Induced Spin Valve Structures." Acta Physica Sinica 74, no. 6 (2025): 0. https://doi.org/10.7498/aps.74.20241744.

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The discovery of ultrafast demagnetization has introduced a new approach for generating ultrafast spin currents using an ultrashort laser, potentially enabling faster manipulation of material magnetism. This has sparked research into the transport mechanisms of ultrafast spin currents. However, the underlying processes remain poorly understood, particularly the factors influencing interlayer spin transfer. This study employs a superdiffusive spin transport model to investigate the ultrafast spin transport mechanisms in the Ni/Ru/Fe spin valve system, with a particular focus on how interlayer s
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Sotome, M., M. Nakamura, J. Fujioka, et al. "Spectral dynamics of shift current in ferroelectric semiconductor SbSI." Proceedings of the National Academy of Sciences 116, no. 6 (2019): 1929–33. http://dx.doi.org/10.1073/pnas.1802427116.

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Photoexcitation in solids brings about transitions of electrons/holes between different electronic bands. If the solid lacks an inversion symmetry, these electronic transitions support spontaneous photocurrent due to the geometric phase of the constituting electronic bands: the Berry connection. This photocurrent, termed shift current, is expected to emerge on the timescale of primary photoexcitation process. We observe ultrafast evolution of the shift current in a prototypical ferroelectric semiconductor antimony sulfur iodide (SbSI) by detecting emitted terahertz electromagnetic waves. By sw
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Kiemle, Jonas, Philipp Zimmermann, Alexander W. Holleitner, and Christoph Kastl. "Light-field and spin-orbit-driven currents in van der Waals materials." Nanophotonics 9, no. 9 (2020): 2693–708. http://dx.doi.org/10.1515/nanoph-2020-0226.

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AbstractThis review aims to provide an overview over recent developments of light-driven currents with a focus on their application to layered van der Waals materials. In topological and spin-orbit dominated van der Waals materials helicity-driven and light-field-driven currents are relevant for nanophotonic applications from ultrafast detectors to on-chip current generators. The photon helicity allows addressing chiral and non-trivial surface states in topological systems, but also the valley degree of freedom in two-dimensional van der Waals materials. The underlying spin-orbit interactions
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Cottrell, W. J., T. G. Ference, and K. A. Puzey. "Improved magnetooptic modulator for ultrafast current pulses." IEEE Photonics Technology Letters 14, no. 5 (2002): 624–26. http://dx.doi.org/10.1109/68.998705.

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Lian, Meng, and Jie Wu. "Ultrafast micropumping by biased alternating current electrokinetics." Applied Physics Letters 94, no. 6 (2009): 064101. http://dx.doi.org/10.1063/1.3080681.

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Kim, Un-Tae, Myeong-Hun Jo, and Hyo-Jin Ahn. "Microgrid-Patterned Ni Foams as Current Collectors for Ultrafast Energy Storage Devices." Metals 14, no. 3 (2024): 354. http://dx.doi.org/10.3390/met14030354.

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Current research is focused on developing active materials through surface functionalization, porosity, composites, and doping for ultrafast electric double layer capacitors (EDLCs). In this study, deviating from existing strategies focused on active materials, we designed tunable 3D microgrid-patterned (MP) surface morphologies on Ni foams used as current collectors using SUS meshes as rigid stamps during roll pressing. The surface geometries of the MP-Ni foams were controlled to standard mesh scales of 24, 40, and 60 (denoted as 24MP-Ni, 40MP-Ni, and 60MP-Ni, respectively). The three MP-Ni s
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Sobacchi, Emanuele, Tsvi Piran, and Luca Comisso. "Ultrafast Variability in AGN Jets: Intermittency and Lighthouse Effect." Astrophysical Journal Letters 946, no. 2 (2023): L51. http://dx.doi.org/10.3847/2041-8213/acc84d.

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Abstract Gamma-ray flares from active galactic nuclei (AGNs) show substantial variability on ultrafast timescales (i.e., shorter than the light-crossing time of the AGN’s supermassive black hole). We propose that ultrafast variability is a by-product of the turbulent dissipation of the jet Poynting flux. Due to the intermittency of the turbulent cascade, the dissipation is concentrated in a set of reconnecting current sheets. Electrons energized by reconnection have a strong pitch-angle anisotropy, i.e., their velocity is nearly aligned with the guide magnetic field. Then each current sheet pr
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Zymmer, K., and P. Mazurek. "Comparative investigation of SiC and Si power electronic devices operating at high switching frequency." Bulletin of the Polish Academy of Sciences: Technical Sciences 59, no. 4 (2011): 555–59. http://dx.doi.org/10.2478/v10175-011-0068-0.

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Comparative investigation of SiC and Si power electronic devices operating at high switching frequencyThe paper presents results of measurements of the reverse recovery current and dynamic forward voltage of the silicon carbide (SiC) Schottky diodes operating at a 500 A/μs current slope. These data were compared with the corresponding parameters determined for ultrafast silicon (Si) diodes. Results of power losses measurement in SiC Schottky diodes operating at switching frequency range of (10-200) kHz are presented and compared with corresponding data of ultrafast Si diodes. Also, results of
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Elezzabi, A. Y., and M. R. Freeman. "Ultrafast magneto‐optic sampling of picosecond current pulses." Applied Physics Letters 68, no. 25 (1996): 3546–48. http://dx.doi.org/10.1063/1.116632.

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Wagner, Ronald S., Jeffrey M. Bradley, Carl J. Maggiore, Jerome G. Beery, and Robert B. Hammond. "An Approach to Measure Ultrafast-Funneling-Current Transients." IEEE Transactions on Nuclear Science 33, no. 6 (1986): 1651–56. http://dx.doi.org/10.1109/tns.1986.4334658.

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Dissertations / Theses on the topic "Ultrafast current"

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Wei, Jiaqi. "Magnetization manipulation induced by spin current and ultrafast laser." Electronic Thesis or Diss., Université de Lorraine, 2021. http://www.theses.fr/2021LORR0121.

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La manipulation de l’aimantation est un des sujets de recherche les plus étudiés dans le domaine de l’électronique de spin. Différentes méthodes de manipulations peuvent exciter les propriétés dynamiques de l’aimantation à différentes échelles de temps. Parmi les phénomènes dynamiques, la précession de l’aimantation et la désaimantation ultrarapide ont suscité un intérêt particulier. La fréquence de précession de l’aimantation est de l’ordre du GHz et correspond à une période de centaines de picosecondes. Cette précession est le mécanisme à l’œuvre dans les nano-oscillateurs à transfert de spi
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Bubelnik, Matthew. "THE EFFECTS OF ELECTRODE GEOMETRY ON CURRENT PULSE CAUSED BY ELECTRICAL DISCHARGE OVER AN ULTRA-FAST LASER FILAMENT." Master's thesis, University of Central Florida, 2005. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/3695.

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The time-resolved electrical conductivity of a short-pulse generated plasma filament in air was studied. Close-coupled metal electrodes were used to discharge the stored energy of a high-voltage capacitor and the resulting microsecond-scale electrical discharge was measured using fast current sensors. Significant differences in the time dependence of the current were seen with the two electrode geometries used. Using sharp-tipped electrodes additional peaks in the time-resolved conductivity were seen, relative to the single peak seen with spherical electrodes. We attribute these additional fea
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Mohamad, Haidar Jawad. "Ultrafast optical measurements of spin-polarized electron dynamics in nanostructured magnetic materials." Thesis, University of Exeter, 2015. http://hdl.handle.net/10871/18425.

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At present, electronic devices depend upon electric charge to transfer and record information. However, such devices are approaching a scaling limit due to Joule heating. Spintronics offers a solution by exploiting the spin rather than the charge of the electron, since the propagation of spin current can in principle occur without dissipation. Immediate applications lie in magnetic random access memory and novel media for hard disk recording. Within this thesis, the Magneto-optical Kerr effect (MOKE) has been used to measure the static and dynamic magnetic properties of a number of different t
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Hurst, Jerome. "Ultrafast spin dynamics in ferromagnetic thin films." Thesis, Strasbourg, 2017. http://www.theses.fr/2017STRAE004/document.

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Dans cette thèse, on s’intéresse à l'étude théorique et à la simulation numérique de la dynamique de charges et de spins dans des nano-structures métalliques. Ces dernières années la physique des nano-structures métalliques à connu un intérêt croissant, aussi bien d'un point de vue de la physique fondamental que d'un point de vue des applications technologiques. Il est donc essentiel d'avoir des modèles théoriques nous permettant de décrire correctement ce type d'objets. Cette thèse comporte deux études distinctes. Dans un premier temps on utilise un modèle semi-classique dans l'espace des pha
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Abdul, Hadi Zeinab. "Terahertz emission spectroscopy of multiferroic bismuth ferrite : insights into ultrafast currents and phonon dynamics." Electronic Thesis or Diss., Le Mans, 2024. http://www.theses.fr/2024LEMA1030.

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La technologie térahertz (THz) a suscité un intérêt significatif dans la communauté scientifique en raison de sa position unique dans le spectre électromagnétique, complétant le gap entre les régions des micro-ondes et de l'infrarouge. Cette radiation est non ionisante et peut pénétrer divers matériaux sans les endommager, ce qui la rend très attirante pour de nombreuses applications potentielles. Les avancées récentes dans la technologie des lasers ultra-rapides ont élargi l'exploration du rayonnement THz à un large éventail de technologies passionnantes. Elle est désormais utilisée dans des
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Welsh, Gregor H. "Understanding and control of ultrafast currents for terahertz generation." Thesis, University of Strathclyde, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.487861.

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Development of terahertz pulse sources and methods are ongoing with an urge to reduce cost, increase quality of emitter design and improve on the output power. This thesis details two advances made in creating terahertz pulses from ultrafast currents, the first is optimising the biasing method used on photoconductive antennas for terahertz emission and the second manufacturing and studying electron-emission type terahertz emitters.
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Barnes, Mark. "Terahertz emission from ultrafast lateral diffusion currents within semiconductor devices." Thesis, University of Southampton, 2014. https://eprints.soton.ac.uk/363127/.

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Single cycle THz emission from unbiased semiconductor devices after ultrafast carrier excitation can be attributed to surge currents on the surface of the device. These currents are due to either drift currents where carriers are accelerated by an internal electric field perpendicular to the surface (surface field effect) or diffusion currents where a separation of charge forms due to electrons and holes having different mobilities (photo-Dember effect). This surface emission is difficult to out couple from the semiconductor device as the emission is parallel to the surface of the semiconducto
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Remy, Quentin. "Ultrafast spin dynamics and transport in magnetic metallic heterostructures." Electronic Thesis or Diss., Université de Lorraine, 2021. http://www.theses.fr/2021LORR0191.

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Le contrôle de l'aimantation, et donc du spin, aux échelles de temps ultra courtes, est un sujet d'importance fondamentale pour l'élaboration de systèmes qui peuvent stocker de l'information beaucoup plus rapidement. La possibilité d'écrire de l'information avec des pulses laser femtoseconde sur des métaux magnétiques tels que GdFeCo ou MnRuGa en quelques picosecondes fut une étape conséquente pour pouvoir réaliser ce progrès technologique. Cependant, le renversement de l'aimantation observé dans ces matériaux après les avoir irradié avec un unique pulse laser, appelé retournement tout optique
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Sternemann, Elmar [Verfasser], Markus [Akademischer Betreuer] Betz, and Torsten [Gutachter] Meier. "Ultrafast coherently controlled currents in GaAs: physics and applications / Elmar Sternemann. Betreuer: Markus Betz. Gutachter: Torsten Meier." Dortmund : Universitätsbibliothek Dortmund, 2015. http://d-nb.info/1110893809/34.

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Paasch-Colberg, Tim [Verfasser], Reinhard [Akademischer Betreuer] Kienberger, and Peter A. [Akademischer Betreuer] Feulner. "Ultrafast, optical-field-induced currents in solid-state materials / Tim Paasch-Colberg. Gutachter: Peter A. Feulner ; Reinhard Kienberger. Betreuer: Reinhard Kienberger." München : Universitätsbibliothek der TU München, 2014. http://d-nb.info/1051078296/34.

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Books on the topic "Ultrafast current"

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Eriksson, Olle, Anders Bergman, Lars Bergqvist, and Johan Hellsvik. Outlook on Magnetization Dynamics. Oxford University Press, 2017. http://dx.doi.org/10.1093/oso/9780198788669.003.0012.

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Since its original formulation in the mid-1990's, atomistic spin-dynamics has become an important tool for modelling of dynamic processes in magnetic materials. So far this book has described current methodological methods and functionalities of atomistic spin-dynamics simulations. Applications of DFT and ASD techniques to selected topics have been presented in this book, for instance methods for calculation of the microscopic Heisenberg and Gilbert parameter from first principles (Chapters 2 and 6), multiscale modelling of magnon spectra in bulk and thin film magnets (Chapter 9), and theoreti
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Book chapters on the topic "Ultrafast current"

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Bauer, T., A. B. Hummel, J. S. Kolb, H. G. Roskos, Yu A. Kosevich, and K. Köhler. "The Hall Current of Coherent Electron Wavepackets." In Ultrafast Phenomena XIII. Springer Berlin Heidelberg, 2003. http://dx.doi.org/10.1007/978-3-642-59319-2_109.

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Pfeiffer, W. "Ultrafast Electrical Voltage and Current Monitors." In Fast Electrical and Optical Measurements. Springer Netherlands, 1986. http://dx.doi.org/10.1007/978-94-017-0445-8_7.

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Kraack, Jan Philip. "Ultrafast structural molecular dynamics investigated with 2D infrared spectroscopy methods." In Topics in Current Chemistry Collections. Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-030-02478-9_4.

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Münzenberg, M. "Spin-wave and spin-current dynamics in ultrafast demagnetization experiments." In Springer Proceedings in Physics. Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-07743-7_28.

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Brundage, Bruce H. "What is the current role of ultrafast CT in coronary imaging?" In Developments in Cardiovascular Medicine. Springer Netherlands, 1996. http://dx.doi.org/10.1007/978-94-009-0291-6_40.

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Mahapatra, Susanta. "Quantum Molecular Dynamics on the Conically Intersecting Potential Energy Surfaces: Nonadiabatic Effects and Ultrafast Relaxation." In Current Developments in Atomic, Molecular, and Chemical Physics with Applications. Springer US, 2002. http://dx.doi.org/10.1007/978-1-4615-0115-2_16.

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Wijesinghe, Philip, and Kishan Dholakia. "Widefield Multiphoton Imaging at Depth with Temporal Focusing." In Neuromethods. Springer US, 2023. http://dx.doi.org/10.1007/978-1-0716-2764-8_9.

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AbstractOptical imaging has the potential to reveal high-resolution information with minimal photodamage. The recent renaissance of super-resolution, widefield, ultrafast, and computational imaging methods has broadened its horizons even further. However, a remaining grand challenge is imaging at depth over a widefield and with a high spatiotemporal resolution. This achievement would enable the observation of fast collective biological processes, particularly those underpinning neuroscience and developmental biology. Multiphoton imaging at depth, combining temporal focusing and single-pixel de
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Avaria, G., M. Grisham, J. Li, et al. "Ionization of Xenon to the Nickel-Like Stage and Beyond in Micro-Capillary Plasma Columns Heated by Ultrafast Current Pulses." In Springer Proceedings in Physics. Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-19521-6_19.

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Laman, N., D. Côté, J. E. Sipe, and H. M. van Driel. "Femtosecond optically induced rectification, shift and injection currents in GaAs." In Ultrafast Phenomena XIII. Springer Berlin Heidelberg, 2003. http://dx.doi.org/10.1007/978-3-642-59319-2_112.

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Yamanishi, M., M. Kurosaki, Y. Osaka, and S. Datta. "Ultrafast Control of Quantum Interference Currents by Virtual Charge Polarizations in Biased Quantum Well Structures." In Ultrafast Phenomena VI. Springer Berlin Heidelberg, 1988. http://dx.doi.org/10.1007/978-3-642-83644-2_94.

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Conference papers on the topic "Ultrafast current"

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Dahan, Mor M., Emanuel Ber, Florian Wunderwald, et al. "Novel Ultrafast Non-Destructive Readout of FeRAM by Low-Voltage Transient Current." In 2025 IEEE International Memory Workshop (IMW). IEEE, 2025. https://doi.org/10.1109/imw61990.2025.11026930.

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Postnikov, D. V., and A. A. Teploukhov. "Modeling Element Redistribution in the Liquid Phase During Ultrafast Solidification Induced by High-Current Electron Beam Exposure." In 2024 Dynamics of Systems, Mechanisms and Machines (Dynamics). IEEE, 2024. https://doi.org/10.1109/dynamics64718.2024.10838695.

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Mlondo, Khanyisani, Mohamed Fayaz Khan, and Olanrewaju Lasabi. "Analysis of a Medium Voltage Direct Current Distribution System for Integration of an Electric Vehicle Ultrafast Charging Station: A Case Study." In 2024 IEEE PES/IAS PowerAfrica. IEEE, 2024. https://doi.org/10.1109/powerafrica61624.2024.10759361.

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Khurgin, Jacob B. "Optically induced DC current in unbiased dielectrics and semiconductors - a straightforward nonlinear optical effect." In Ultrafast Optics. Optica Publishing Group, 2023. http://dx.doi.org/10.1364/ufo.2023.p1.15.

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We demonstrate theoretically that when well-below-the-bandgap femtosecond optical pulses propagate through a dielectric or semiconductor, DC current and charges are produced even though no real carriers are excited in the bands. This theory is confirmed by recent experiments.
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Feise, M. W., D. S. Citrin, M. Bieler, et al. "Spatially resolved current density dynamics in photoconductive switches." In Ultrafast Electronics and Optoelectronics. OSA, 2001. http://dx.doi.org/10.1364/ueo.2001.ufa5.

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Bauer, T., A. B. Hummel, J. S. Kolb, H. G. Roskos, Yu A. Kosevich, and K. Köhler. "The Hall Current of Coherent Electron Wavepackets." In International Conference on Ultrafast Phenomena. OSA, 2002. http://dx.doi.org/10.1364/up.2002.tud3.

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Sorokin, Sergey. "Ultrafast Wire Loading with Multi-Megaampere Current." In 2020 7th International Congress on Energy Fluxes and Radiation Effects (EFRE). IEEE, 2020. http://dx.doi.org/10.1109/efre47760.2020.9241993.

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Amano, T., Y. Kawakami, H. Itoh та ін. "Ultrafast magnetization driven by spiral current in Kitaev spin liquid α-RuCl3". У International Conference on Ultrafast Phenomena. Optica Publishing Group, 2022. http://dx.doi.org/10.1364/up.2022.tu2a.2.

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In a honeycomb-lattice Mott insulator α-RuCl3, an ultrafast magnetization is induced by circularly polarized excitation of spin-orbit excitons. An ultrafast 6-fs measurement clarifies that the orbital moment emerges from a coherent inter-orbital charge motion.
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Manfredi, Giovanni, Paul-Antoine Hervieux, and Jerome Hurst. "Ultrafast spin current generation in ferromagnetic thin films." In Spintronics XI, edited by Henri Jaffrès, Henri-Jean Drouhin, Jean-Eric Wegrowe, and Manijeh Razeghi. SPIE, 2018. http://dx.doi.org/10.1117/12.2319953.

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Sato, Shunsuke A., Wenwen Mao, and Angel Rubio. "THz-induced nonlinear electric current and high-order harmonic generation in graphene." In International Conference on Ultrafast Phenomena. Optica Publishing Group, 2022. http://dx.doi.org/10.1364/up.2022.tu4a.9.

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We study the electric transport and high-order harmonic generation in graphene with the quantum master equation. The microscopic mechanism of these THz-induced non-linear phenomena is understood from the viewpoint of the nonequilibrium steady state.
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Reports on the topic "Ultrafast current"

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Yang, Xi. Current Status of Developing Ultrafast Mega-electron-volt Electron Microsope. Office of Scientific and Technical Information (OSTI), 2022. http://dx.doi.org/10.2172/1898598.

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