Rashba split surface states in BiTeBr

Abstract

Within density functional theory, we study bulk band structure and surface states of BiTeBr. We consider both ordered and disordered phases which differ in atomic order in the Te-Br sublattice. On the basis of relativistic ab-initio calculations, we show that the ordered BiTeBr is energetically preferable as compared with the disordered one. We demonstrate that both Te- and Br-terminated surfaces of the ordered BiTeBr hold surface states with a giant spin-orbit splitting. The Te-terminated surface-state spin splitting has the Rashba-type behavior with the coupling parameter α_R ~ 2 eVÅ.

8 pages, 7 figures

References in corpus (8)

• Strong spin-orbit splitting on Bi surfaces
• Silicon surface with giant spin-splitting
• Ideal two-dimensional electron systems with a giant Rashba-type spin splitting in real materials: surfaces of bismuth tellurohalides
• Giant ambipolar Rashba effect in a semiconductor: BiTeI
• Strongly spin-orbit coupled two-dimensional electron gas emerging near the surface of polar semiconductors
• Rashba type spin-orbit splitting of quantum well states in ultrathin Pb films
• Gate-controlled spin-orbit interaction in a parabolic GaAs/AlGaAs quantum well
• Many-body effects on the Rashba-type spin splitting in bulk bismuth tellurohalides

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