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  THz-induced high-order harmonic generation and nonlinear charge transport in graphene

Mao, W., Rubio, A., & Sato, S. (2022). THz-induced high-order harmonic generation and nonlinear charge transport in graphene.

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2203.07649.pdf (Preprint), 4MB
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2203.07649.pdf
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File downloaded from arXiv at 2022-03-16
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2022
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https://arxiv.org/abs/2203.07649 (Preprint)
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 Creators:
Mao, W.1, Author              
Rubio, A.1, 2, Author              
Sato, S.1, 3, Author              
Affiliations:
1Theory Group, Theory Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_2266715              
2Center for Computational Quantum Physics (CCQ), Flatiron Institute, ou_persistent22              
3Center for Computational Sciences, University of Tsukuba, ou_persistent22              

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Free keywords: Condensed Matter, Mesoscale and Nanoscale Physics, cond-mat.mes-hall, Physics, Optics, physics.optics
 Abstract: We theoretically study the THz-induced high-order harmonic generation (HHG) and nonlinear electric transport in graphene based on the quantum master equation with the relaxation time approximation. To obtain microscopic insight into the phenomena, we compare the results of the fully dynamical calculations with those under a quasi-static approximation, where the electronic system is approximated as a nonequilibrium steady state. As a result, we find that the THz-induced electron dynamics in graphene can be accurately modeled with the nonequilibrium steady-state at each instance. The population distribution analysis further clarifies that the THz-induced HHG in graphene originates from the reduction of effective conductivity due to a large displacement of electrons in the Brillouin zone. By comparing the present nonequilibrium picture with a thermodynamic picture, we explore the role of the nonequilibrium nature of electron dynamics on the extremely nonlinear optical and transport phenomena in graphene.

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Language(s): eng - English
 Dates: 2022-03-15
 Publication Status: Published online
 Pages: 10
 Publishing info: -
 Table of Contents: -
 Rev. Type: No review
 Identifiers: arXiv: 2203.07649
 Degree: -

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