Graphene p-n junctions with nonuniform Rashba spin-orbit coupling
arXiv:1206.6503 · doi:10.1063/1.3641873
Abstract
Linear conductance of graphene-based p-n junctions with Rashba spin-orbit coupling is considered theoretically. A square potential step is used to model the junctions, while the coupling is introduced in terms of the Kane-Mele model (C.L. Kane and E.J. Mele, Phys.Rev.Lett. 95, 226801(2005)). The main objective is a description of electronic transport in junctions where Rashba parameter is nonuniform. Such a nonuniformity can appear when graphene is asymmetrically covered with atomic layers, or when Rashba coupling is strongly dependent on electric field. It is shown that conductance is significantly modified by the considered nonuniformity, which is most clearly manifested by an anomalous minimum at a certain potential step height.
4 pages, 4 figures
References in corpus (13)
- Electric Field Effect in Atomically Thin Carbon Films
- Quantum Spin Hall Effect in Graphene
- Chiral tunneling and the Klein paradox in graphene
- Intrinsic and Rashba Spin-orbit Interactions in Graphene Sheets
- A Graphene Field-Effect Device
- Spin-orbit coupling in curved graphene, fullerenes, nanotubes, and nanotube caps
- Band-structure topologies of graphene: spin-orbit coupling effects from first principles
- Impurity induced spin-orbit coupling in graphene
- Rashba effect in the graphene/Ni(111) system
- Graphene with Structure-Induced Spin-Orbit Coupling: Spin-Polarized States, Spin Zero Modes, and Quantum Hall Effect
- Electron spin relaxation in graphene: the role of the substrate
- Spin-orbit effects in a graphene bipolar pn junction
- Mesoscopic spin Hall effect along a potential step in graphene
Cited by in corpus (10)
- Charge transport in pn and npn junctions of silicene
- Spin-dependent Klein tunneling in graphene: Role of Rashba spin-orbit coupling
- Thermoelectric effects in graphene with local spin-orbit interaction
- Rashba spin-orbit interaction in graphene armchair nanoribbons
- Quantum Transport of Dirac fermions in graphene with a spatially varying Rashba spin-orbit coupling
- Gate-induced carrier density modulation in bulk graphene: Theories and electrostatic simulation using Matlab pdetool
- Reduction scheme for coupled Dirac systems
- The influence of anisotropic Rashba spin-orbit coupling on current-induced spin polarization in graphene
- Spin polarization direction switch based on an asymmetrical quantum wire
- Confinement in bilayer graphene via intra- and inter-layer interactions