Spin-valley locking in Kekul\'e-distorted graphene with Dirac-Rashba interactions
Abstract
The joint effects of Kekul\'e lattice distortions and Rashba-type spin-orbit coupling on the electronic properties of graphene are explored. We modeled the position dependence of the Rashba energy term in a manner that allows its seamless integration into the scheme introduced by Gamayun et al.[New J. Phys. 20, 023016 (2018)] to describe graphene with Kekul\'e lattice distortion. Particularly for the Kekul\'e-Y texture, the effective low energy Dirac Hamiltonian contains a new spin-valley locking term, in addition to the well-known Rashba-induced momentum-pseudospin and spin-pseudospin couplings, and the Kekul\'e-induced momentum-valley coupling term. We report on the low-energy band structure and Landau level spectra of Rashba-spin-orbit-coupled Kek-Y graphene, and propose an experimental scheme to discern between the presence of Rashba spin-orbit coupling, Kek-Y lattice distortion, and both, based on doping-dependent magnetotransport measurements.
Keywords
Cite
@article{arxiv.2308.02130,
title = {Spin-valley locking in Kekul\'e-distorted graphene with Dirac-Rashba interactions},
author = {David A. Ruiz-Tijerina and Jesús Arturo Sánchez-Sánchez and Ramon Carrillo-Bastos and Santiago Galván y García and Francisco Mireles},
journal= {arXiv preprint arXiv:2308.02130},
year = {2023}
}
Comments
14 pages, including 8 figures and 4 appendices