Observation of robust zero-energy state and enhanced superconducting gap in a trilayer heterostructure of MnTe/Bi₂Te₃/Fe(Te, Se).

ABSTRACT: The interface between magnetic material and superconductors has long been predicted to host unconventional superconductivity, such as spin-triplet pairing and topological nontrivial pairing state, particularly when spin-orbital coupling (SOC) is incorporated. To identify these unconventional pairing states, fabricating homogenous heterostructures that contain such various properties are preferred but often challenging. Here, we synthesized a trilayer-type van der Waals heterostructure of MnTe/Bi₂Te₃/Fe(Te, Se), which combined s-wave superconductivity, thickness-dependent magnetism, and strong SOC. Via low-temperature scanning tunneling microscopy, we observed robust zero-energy states with notably nontrivial properties and an enhanced superconducting gap size on singl

SUBMITTER: Ding S 

PROVIDER: S-EPMC9473575 | biostudies-literature | 2022 Sep

REPOSITORIES: biostudies-literature