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Journal Article

Nonlinear electric conductivity and THz-induced charge transport in graphene

MPS-Authors
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Sato,  S.
Center for Computational Sciences, University of Tsukuba;
Theory Group, Theory Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society;

/persons/resource/persons22028

Rubio,  A.
Theory Group, Theory Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society;
Center for Computational Quantum Physics (CCQ), Flatiron Institute;

External Resource

https://dx.doi.org/10.1088/1367-2630/ac03d0
(Publisher version)

https://arxiv.org/abs/2103.11969
(Preprint)

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Fulltext (public)

Sato_2021_New_J._Phys._23_063047.pdf
(Publisher version), 3MB

Supplementary Material (public)
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Citation

Sato, S., & Rubio, A. (2021). Nonlinear electric conductivity and THz-induced charge transport in graphene. New Journal of Physics, 23: 063047. doi:10.1088/1367-2630/ac03d0.


Cite as: https://hdl.handle.net/21.11116/0000-0008-C17C-3
Abstract
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.