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Spin-Orbit Coupling Effects in InSe Films

  • Samuel J. MagorrianEmail author
Chapter
Part of the Springer Theses book series (Springer Theses)

Abstract

In this chapter, we explore two important consequences of spin-orbit coupling (SOC) near the band edges of ultrathin InSe films. Firstly, we show how conduction band electrons in few-layer InSe experience the Rashba effect, which can give rise to anomalous magnetotransport effects arising from weak antilocalisation. SOC is added to the self-consistent hybrid \(\mathbf {k \cdot p}\) tight-binding model perturbatively, and the variation of Rashba SOC with the strength and profile of doping can therefore be investigated. Secondly, we show how spin-orbit coupling (SOC) hybridises deeper occupied bands with the band-edge valence states, satisfying the angular momentum and symmetry requirements to allow the principal interband optical transition to couple to in-plane polarised light. The relaxation of the selection rule for the polarisation of the principal interband optical transition is strongest in the monolayer, and becomes very weak in the bulk limit.

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© Springer Nature Switzerland AG 2019

Authors and Affiliations

  1. 1.National Graphene InstituteUniversity of ManchesterManchesterUK

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