Home > Publications database > Orbital Complexity in Intrinsic Magnetic Topological Insulators MnBi 4 Te 7 and MnBi 6 Te 10 |
Journal Article | FZJ-2021-04764 |
; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ;
2021
APS
College Park, Md.
This record in other databases:
Please use a persistent id in citations: http://hdl.handle.net/2128/29268 doi:10.1103/PhysRevLett.126.176403
Abstract: Using angle-resolved photoelectron spectroscopy (ARPES), we investigate the surface electronic structure of the magnetic van der Waals compounds MnBi4Te7 and MnBi6Te10, the n=1 and 2 members of a modular (Bi2Te3)n(MnBi2Te4) series, which have attracted recent interest as intrinsic magnetic topological insulators. Combining circular dichroic, spin-resolved and photon-energy-dependent ARPES measurements with calculations based on density functional theory, we unveil complex momentum-dependent orbital and spin textures in the surface electronic structure and disentangle topological from trivial surface bands. We find that the Dirac-cone dispersion of the topologial surface state is strongly perturbed by hybridization with valence-band states for Bi2Te3-terminated surfaces but remains preserved for MnBi2Te4-terminated surfaces. Our results firmly establish the topologically nontrivial nature of these magnetic van der Waals materials and indicate that the possibility of realizing a quantized anomalous Hall conductivity depends on surface termination.
![]() |
The record appears in these collections: |