First-principles study of spin texture and Fermi lines in Bi(111) multi-layer nanofilm

2017/03/24 by Hiroki Kotaka, Kotaka, Hiroki, Fumiyuki Ishii +3
Physics and Astronomy · #FOS: Physical sciences #Materials Science (cond-mat.mtrl-sci) #Mesoscale and Nanoscale Physics (cond-mat.mes-hall) #cond-mat.mes-hall #cond-mat.mtrl-sci

paper · pdf · doi:10.48550/arxiv.1703.08287

Main Text (4 pages, 4 figures) and Supplemental Materials (2 pages, 3 figures)

arxiv created 2017/06/02 · arxiv updated 2017/06/05

Abstract

We have performed a fully relativistic first-principles density functional calculation examining the surface state of bismuth (Bi) (111) multi-layer nanofilm, with up to 20 Bi bilayers, and investigated the Rashba effect and spin texture on the Bi surfaces. We have revealed a giant out-of-plane spin states on the Fermi lines, and the maximum value of the out-of-plane spin component being approximately 40% of the magnitude of the total spin. We have also evaluated the Rashba parameter α_R ≃ 1.9 \rm eV⋅Åusing the surface state bands which is buried in the bulk state, at -0.32 eV below the Fermi energy.

Related

• A closer look at how symmetry constraints and the spin-orbit coupling shape the electronic structure of Bi(111)
• Strong spin-orbit splitting on Bi surfaces
• Band Topology and Dichroic Signature of Bismuth
• One-Dimensional Edge States with Giant Spin Splitting in a Bismuth Thin Film
• Topological blocking at the Bi(111) surface due to surface relaxation