Single-Layer Magnet Phase in Intrinsic Magnetic Topological Insulators, [MnTe][Bi₂Te₃]_<i>n</i>, Far beyond the Thermodynamic Limit.

ABSTRACT: The intrinsic magnetic topological insulator (IMTI) family [MnTe][Bi₂Te₃]_n has demonstrated magneto-topological properties dependent on n, making it a promising platform for advanced electronics and spintronics. However, due to technical barriers in sample synthesis, their properties in the large n limit remain unknown. To overcome this, we utilized the atomic layer-by-layer molecular beam epitaxy (ALL-MBE) technique and achieved IMTIs with n as large as 15, far beyond that previously reported in bulk crystals or thin films. Then, we discover that the "single-layer magnet (SLM)" phase, primarily determined by intralayer ferromagnetic coupling, emerges for n > ∼4 and remains little affected up to n = 15. Nonetheless,

SUBMITTER: Jain D 

PROVIDER: S-EPMC12333432 | biostudies-literature | 2025 Mar

REPOSITORIES: biostudies-literature