The layered van der Waals antiferromagnet MnBi2Te4 has been predicted to combine the band ordering of archetypical topological insulators such as Bi2Te3 with the magnetism of Mn, making this material a viable candidate for the realization of various magnetic topological states. We have systematically investigated the surface electronic structure of MnBi2Te4(0001) single crystals by use of spin- and angle-resolved photoelectron spectroscopy experiments. In line with theoretical predictions, the results reveal a surface state in the bulk band gap and they provide evidence for the influence of exchange interaction and spin-orbit coupling on the surface electronic structure.
@article{arxiv.1903.11826,
title = {Surface states and Rashba-type spin polarization in antiferromagnetic MnBi$_2$Te$_4$},
author = {R. C. Vidal and H. Bentmann and T. R. F. Peixoto and A. Zeugner and S. Moser and C. H. Min and S. Schatz and K. Kissner and M. Ünzelmann and C. I. Fornari and H. B. Vasili and M. Valvidares and K. Sakamoto and D. Mondal and J. Fujii and I. Vobornik and S. Jung and C. Cacho and T. K. Kim and R. J. Koch and C. Jozwiak and A. Bostwick and J. D. Denlinger and E. Rotenberg and J. Buck and M. Hoesch and F. Diekmann and S. Rohlf and M. Kalläne and K. Rossnagel and M. M. Otrokov and E. V. Chulkov and M. Ruck and A. Isaeva and F. Reinert},
journal= {arXiv preprint arXiv:1903.11826},
year = {2019}
}