Rashba spin-orbit coupling induced rectified currents in monolayer graphene with exchange field and sublattice potential

doi:10.1088/1674-1056/acc932

中国物理B ›› 2023, Vol. 32 ›› Issue (8): 87103-087103.doi: 10.1088/1674-1056/acc932

Rashba spin-orbit coupling induced rectified currents in monolayer graphene with exchange field and sublattice potential

Liang Chen(陈亮)^†, Feng Li(李峰), and Xiao-Ming Ding(丁晓明)

School of Physics and Electronic Engineering, Taishan University, Taian 271000, China

收稿日期:2022-09-22 修回日期:2023-03-30 接受日期:2023-03-31 发布日期:2023-07-26
通讯作者: Liang Chen E-mail:tsuchenliang@tsu.edu.cn
基金资助:
Project supported by the Shandong Province Natural Science Foundation (Grant No.ZR2021MF077).

Rashba spin-orbit coupling induced rectified currents in monolayer graphene with exchange field and sublattice potential

Liang Chen(陈亮)^†, Feng Li(李峰), and Xiao-Ming Ding(丁晓明)

School of Physics and Electronic Engineering, Taishan University, Taian 271000, China

Received:2022-09-22 Revised:2023-03-30 Accepted:2023-03-31 Published:2023-07-26
Contact: Liang Chen E-mail:tsuchenliang@tsu.edu.cn
Supported by:
Project supported by the Shandong Province Natural Science Foundation (Grant No.ZR2021MF077).

摘要/Abstract

摘要： We investigate the effect of Rashba spin-orbit coupling (RSOC) on photoconductivities of rectified currents in monolayer graphene with exchange field and sublattice potential. The system shows that the photoconductivities of resonant shift and injection current contributions are nonzero, while the photoconductivities of non-resonant shift current contribution are zero. We find that the RSOC induces a warping term, which leads to the nonzero rectified currents. Moreover, the photoconductivities of resonant injection (shift) current contribution are (not) related to the relaxation rate. The similar behavior can be found in other Dirac materials, and our findings provide a way to tune the nonlinear transport properties of Dirac materials.

关键词: graphene, spin orbit coupling, shift current, inject current

Abstract: We investigate the effect of Rashba spin-orbit coupling (RSOC) on photoconductivities of rectified currents in monolayer graphene with exchange field and sublattice potential. The system shows that the photoconductivities of resonant shift and injection current contributions are nonzero, while the photoconductivities of non-resonant shift current contribution are zero. We find that the RSOC induces a warping term, which leads to the nonzero rectified currents. Moreover, the photoconductivities of resonant injection (shift) current contribution are (not) related to the relaxation rate. The similar behavior can be found in other Dirac materials, and our findings provide a way to tune the nonlinear transport properties of Dirac materials.

Key words: graphene, spin orbit coupling, shift current, inject current

中图分类号: (Spin-orbit coupling, Zeeman and Stark splitting, Jahn-Teller effect)

71.70.Ej

81.05.ue (Graphene)

Liang Chen(陈亮), Feng Li(李峰), and Xiao-Ming Ding(丁晓明). Rashba spin-orbit coupling induced rectified currents in monolayer graphene with exchange field and sublattice potential[J]. 中国物理B, 2023, 32(8): 87103-087103.

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Rashba spin-orbit coupling induced rectified currents in monolayer graphene with exchange field and sublattice potential

Rashba spin-orbit coupling induced rectified currents in monolayer graphene with exchange field and sublattice potential

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