Nonlinear electric conductivity and THz-induced charge transport in graphene

被引：6

作者：

Sato, Shunsuke A. ^{[1
,2
]}

Rubio, Angel ^{[2
,3
]}

机构：

[1] Univ Tsukuba, Ctr Computat Sci, Tsukuba, Ibaraki 3058577, Japan

[2] Max Planck Inst Struct & Dynam Matter, Luruper Chaussee 149, D-22761 Hamburg, Germany

[3] Flatiron Inst, Ctr Computat Quantum Phys CCQ, 162 Fifth Ave, New York, NY 10010 USA

来源：

NEW JOURNAL OF PHYSICS | 2021年 / 23卷 / 06期

基金：

欧洲研究理事会;

关键词：

graphene; nonlinear optics; light-induced charge transport; DYNAMICS; DRIVEN;

D O I：

10.1088/1367-2630/ac03d0

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Based on the quantum master equation approach, the nonlinear electric conductivity of graphene is investigated under static electric fields for various chemical potential shifts. The simulation results show that, as the field strength increases, the effective conductivity is firstly suppressed, reflecting the depletion of effective carriers due to the large displacement in the Brillouin zone caused by the strong field. Then, as the field strength exceeds 1 MV m(-1), the effective conductivity increases, overcoming the carrier depletion via the Landau-Zener tunneling process. Based on the nonlinear behavior of the conductivity, the charge transport induced by few-cycle THz pulses is studied to elucidate the ultrafast control of electric current in matter.

引用

页数：8

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