Laser-Driven Field Emission from Graphene Nanoribbons: Time-Dependent Density-Functional Theory Simulations
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概要
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First-principles simulations were carried out to explore the excited electron dynamics of graphene nanoribbons (GNRs) under femtosecond laser pulses and an electrostatic field. Electron emission was found to be governed by both the electric dipole transition probability and the characters of the excited states, which are dependent on the edge termination of the GNR. For the laser parameters used in the simulations, the emission mechanism was demonstrated to be one-photon photoemission. The present approach enables a physical interpretation of highly nonequilibrium electron emission processes.
- 2012-10-25
著者
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HU Chunping
Department of Materials Engineering, The University of Tokyo
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Watanabe Kazuyuki
Department Of Orthopaedic Surgery Fukushima Medical University School Of Medicine
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Hu Chunping
Department of Physics, Faculty of Science, Tokyo University of Science, Shinjuku, Tokyo 162-8601, Japan
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Utsugi Daisuke
Department of Physics, Faculty of Science, Tokyo University of Science, Shinjuku, Tokyo 162-8601, Japan
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UTSUGI Daisuke
Department of Physics, Faculty of Science, Tokyo University of Science
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Watanabe Kazuyuki
Department of Atomic Science and Nuclear Engineering, Faculty of Engineering, Hokkaido University
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