Nonlinear electric conductivity and THz-induced charge transport in graphene
New Journal Of Physics 23, 063047 (2021)
Nonlinear electric conductivity and THz-induced charge transport in graphene
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.
Additional Information
- Download
- Preprint - 2.32 MB
- Doi
- http://dx.doi.org/https://doi.org/10.1088/1367-2630/ac03d0
- Notes
- This work was supported by JSPS KAKENHI Grant Number JP20K14382, the European Research Council (ERC-2015-AdG694097), the Cluster of Excellence ’Advanced Imaging of Matter’ (AIM), Grupos Consolidados (IT1249-19) and SFB925 ‘Light induced dynamics and control of correlated quantum systems’. We thank Enago for the English language review. The Flatiron Institute is a division of the Simons Foundation.
Related Projects
- Center for Computational Quantum Physics (CCQ), The Flatiron Institute, New York
- Cluster of Excellence
- MPSD-Max-Planck Hamburg