Issue |
EPL
Volume 102, Number 5, June 2013
|
|
---|---|---|
Article Number | 57001 | |
Number of page(s) | 6 | |
Section | Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties | |
DOI | https://doi.org/10.1209/0295-5075/102/57001 | |
Published online | 13 June 2013 |
Spin-orbit–induced spin splittings in polar transition metal dichalcogenide monolayers
KAUST, PSE Division - Thuwal 23955-6900, Kingdom of Saudi Arabia
(a) udo.schwingenschlogl@kaust.edu.sa
Received: 2 February 2013
Accepted: 15 May 2013
The Rashba effect in quasi two-dimensional materials, such as noble metal surfaces and semiconductor heterostructures, has been investigated extensively, while interest in real two-dimensional systems has just emerged with the discovery of graphene. We present ab initio electronic structure, phonon, and molecular-dynamics calculations to study the structural stability and spin-orbit–induced spin splitting in the transition metal dichalcogenide monolayers MXY (M = Mo, W and X, Y = S, Se, Te). In contrast to the non-polar systems with X = Y, in the polar systems with X ≠ Y the Rashba splitting at the Γ-point for the uppermost valence band is caused by the broken mirror symmetry. An enhancement of the splitting can be achieved by increasing the spin-orbit coupling and/or the potential gradient.
PACS: 73.22.-f – Electronic structure of nanoscale materials and related systems / 75.70.Tj – Spin-orbit effects
© EPLA, 2013
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