Quantum Transport in a Graphene-Nanoribbon-Based Device with Rashba Spin- Orbit Coupling

IF 1.7 4区物理与天体物理 Q3 PHYSICS, MULTIDISCIPLINARY

International Journal of Theoretical Physics Pub Date : 2026-04-10 DOI:10.1007/s10773-026-06326-0

Xiao-Dong Tan, Jian Lei, Yu Shi, Li-Jun Li

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Abstract

Based on the mean-field Hubbard model and the Green’s function formalism, we study the transport properties in a graphene-nanoribbon-based device with Rashba spin–orbit coupling (RSOC). Several influences on the conductance are discussed in detail, including ribbon width, ribbon length, RSOC, top-gate-generated potential energy V, on-site Coulomb repulsion U, Fermi energy E_F, and temperature T. The results show that the transport properties of this device are strongly related to its magnetic configurations that are primarily determined by U, and partly dependent on V and E_F. The RSOC and T have no significant effect on the total conductance. Interestingly, the total conductance exhibits a fluctuating behavior with increasing ribbon length and V at U = 1.2t. This behavior of conductance could be well modulated by top and back gates, thus making it available for field-effect transistors.

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基于Rashba自旋-轨道耦合的石墨烯-纳米带器件中的量子输运

基于平均场Hubbard模型和Green函数形式，研究了具有Rashba自旋-轨道耦合（RSOC）的石墨烯-纳米带器件的输运性质。结果表明，该器件的输运性质与其磁组态密切相关，其磁组态主要由U决定，部分取决于V和EF。RSOC和T对总电导无显著影响。有趣的是，在U = 1.2t时，总电导随带长和V的增加而波动。这种电导行为可以通过顶极和后门很好地调制，从而使其可用于场效应晶体管。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

International Journal of Theoretical Physics 物理-物理：综合

CiteScore

2.50

自引率

21.40%

发文量

258

审稿时长

3.3 months

期刊介绍： International Journal of Theoretical Physics publishes original research and reviews in theoretical physics and neighboring fields. Dedicated to the unification of the latest physics research, this journal seeks to map the direction of future research by original work in traditional physics like general relativity, quantum theory with relativistic quantum field theory,as used in particle physics, and by fresh inquiry into quantum measurement theory, and other similarly fundamental areas, e.g. quantum geometry and quantum logic, etc.