Magnetic Exchange Mechanism and Quantized Anomalous Hall Effect in Bi₂Se₃ Film with a CrWI₆ Monolayer.

ABSTRACT: Magnetizing the surface states of topological insulators without damaging their topological features is a crucial step for realizing the quantum anomalous Hall (QAH) effect and remains a challenging task. The TI-ferromagnetic material interface system was constructed and studied by the density functional theory (DFT). A two-dimensional magnetic semiconductor CrWI₆ has been proven to effectively magnetize topological surface states (TSSs) via the magnetic proximity effect. The non-trivial phase was identified in the Bi₂Se₃ (BS) films with six quantum layers (QL) within the CrWI₆/BS/CrWI₆ heterostructure. BS thin films exhibit the generation of spin splitting near the TSSs, and a band gap of approximately 2.9 meV is observed at the Γ in

SUBMITTER: Huang H 

PROVIDER: S-EPMC11396793 | biostudies-literature | 2024 Aug

REPOSITORIES: biostudies-literature