Ultrahigh mobility and Rashba spin splitting in Sb-substituted bismuth telluride and bismuth selenide.

ABSTRACT: Topological insulators (TIs) such as Sb-doped Bi₂Te₃ and Bi₂Se₃ exhibit promising phenomena for advanced spintronics. While previous studies explored isolated doping levels; a systematic understanding of how Sb concentration influences topological behavior, Rashba-type spin splitting, and surface state formation is lacking. Here, we use density functional theory to investigate the structural, electronic, topological and transport properties of (Bi_1-xSb_x)₂Te₃ and (Bi_1-xSb_x)₂Se₃ thin films across 0 ≤ x ≤ 1. We identify pronounced Rashba spin splitting in Bi₂Te₃ at x = 0.5, 0.6, and 0.9 with in-plane

SUBMITTER: Kavkhani R 

PROVIDER: S-EPMC12810114 | biostudies-literature | 2026 Jan

REPOSITORIES: biostudies-literature