Investigation of magnetic topological crystalline insulator heterostructures consisting of SnTe and MnBi2Te4

Beamtime at Synchrotron SOLARIS (Beamline: URANOS), Krakau, Polen.

Objectives: Introducing magnetism into a topological crystalline insulator (TCI) leads to realizing novel quantum phenomena such as quantum anomalous Hall effect (QAHE) characterized by multiple dissipation less chiral edge states. However, there has been no experimental report of observing QAHE in TCI systems yet because it is difficult to introduce homogeneous magn etic orders without sacrificing the highly crystalline quality of the material. In this study, we design a novel model system of heterostructures and superlattices consisting of TCI SnTe and a highly ordered magnetic layer of MnBi2Te4 to overcome this diff iculty. In this proposal, we will observe electronic band structures of these SnTe/MnBi2Te4 systems by ARPES and investigate the effect of the magnetic layer on the topological surface state of TCI. Our results will provide a basis for realizing QAHE in TC I systems for the first time.