Condensed Matter Physics, 2017, vol. 20, No. 1, 13702
DOI:10.5488/CMP.20.13702
arXiv:1701.00363
Title:
Rashba spinorbit interaction enhanced by graphene inplane deformations
Author(s):

B. Berche
(Groupe de Physique Statistique, Institut Jean Lamour, Université de Lorraine, 54506 VandoeuvrelesNancy, France; Centro de Física, Instituto Venezolano de Investigaciones Científicas, 21827, Caracas,
1020 A, Venezuela)
,


F. Mireles
(Centro de Nanociencias y Nanotecnología, Universidad Nacional Autónoma de México, Apdo. Postal 14, 22800 Ensenada B.C., México)
,


E. Medina
(Groupe de Physique Statistique, Institut Jean Lamour, Université de Lorraine, 54506 VandoeuvrelesNancy, France; Centro de Física, Instituto Venezolano de Investigaciones Científicas, 21827, Caracas,
1020 A, Venezuela;
Yachay Tech, School of Physical Sciences & Nanotechnology, 100119Urcuquí, Ecuador)

Graphene consists in a singlelayer carbon crystal where 2p_{z} electrons display a linear dispersion relation in the vicinity of the Fermi level, conveniently described by a massless Dirac equation in
2+1 spacetime. Spinorbit effects open a gap in the band structure and offer perspectives for the manipulation of the conducting electrons spin. Ways to manipulate spinorbit couplings in graphene have been generally
assessed by proximity effects to metals that do not compromise the mobility of the unperturbed system and are likely to induce strain in the graphene layer. In this work we explore the
U(1)×SU(2) gauge fields that result from the uniform stretching of a graphene sheet under a perpendicular electric field. Considering such deformations is particularly relevant due to the counterintuitive
enhancement of the Rashba coupling between 3050% for small bond deformations well known from tightbinding and DFT calculations. We report the accesible changes that can be operated in the band structure in the vicinity of the K points
as a function of the deformation strength and direction.
Key words:
graphene, spincurrent, spinorbit interaction
PACS:
72.80.Vp, 75.70.Tj, 11.15.q
