Defect Engineering for Stabilizing Magnetic and Topological Properties in Mn(Bi_1-xSb_x)₂Te₄.

ABSTRACT: MnBi₂Te₄ is a versatile platform for exploring diverse topological quantum states, yet its potential is hampered by intrinsic antisite defects. While Sb substitution has been employed to tune the Fermi level towards the charge neutral point, it exacerbates the formation of Mn-Sb antisite defects. Here, we address this challenge by combining first-principles calculations with strategic synthesis to systematically investigate and control antisite defects in Mn(Bi_1-xSb_x)₂Te₄. Our calculations reveal that increasing antisite defect density progressively destroys the field-forced magnetic Weyl state, eventually driving the system into a trivial magnetic insulator. Motivated by these findings, we develop an optimized chemical vapo

SUBMITTER: Chen H 

PROVIDER: S-EPMC12847911 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature