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Surface states and Rashba-type spin polarization in antiferromagnetic MnBi2Te4(0001)

DOI: 10.1103/PhysRevB.100.121104 DOI Help

Authors: R. C. Vidal (Universität Würzburg) , H. Bentmann (University of Wuerzburg) , T. R. F. Peixoto (University of Wuerzburg) , A. Zeugner (Technische Universität Dresden) , S. Moser (Advanced Light Source; Universität Würzburg) , C.-h. Min (Universität Würzburg) , S. Schatz (Universität Würzburg) , K. Kissner (Universität Würzburg) , M. Unzelmann (Universität Würzburg) , C. I. Fornari (Universität Würzburg) , H. B. Vasili (ALBA Synchrotron Light Source) , M. Valvidares (ALBA Synchrotron Light Source) , K. Sakamoto (Osaka University) , D. Mondal (Istituto Officina dei Materiali (IOM)-CNR; ICTP (International Centre for Theoretical Physics (ICTP)) , J. Fujii (Istituto Officina dei Materiali (IOM)-CNR) , I. Vobornik (Istituto Officina dei Materiali (IOM)-CNR) , S. Jung (Diamond Light Source) , C. Cacho (Diamond Light Source) , T. K. Kim (Diamond Light Source) , R. J. Koch (Advanced Light Source) , C. Jozwiak (Advanced Light Source) , A. Bostwick (Advanced Light Source) , J. D. Denlinger (Advanced Light Source) , E. Rotenberg (Advanced Light Source) , J. Buck (Deutsches Elektronen-Synchrotron) , M. Hoesch (Deutsches Elektronen-Synchrotron) , F. Diekmann (Christian-Albrechts-Universität zu Kiel) , S. Rohlf (Christian-Albrechts-Universität zu Kiel) , M. Kalläne (Christian-Albrechts-Universität zu Kiel; Deutsches Elektronen-Synchrotron) , K. Rossnagel (Deutsches Elektronen-Synchrotron; Christian-Albrechts-Universität zu Kiel) , M. M. Otrokov (Centro Mixto CSIC-UPV/EHU; IKERBASQUE, Basque Foundation for Science; Donostia International Physics Center (DIPC)) , E. V. Chulkov (Donostia International Physics Center (DIPC); UPV/EHU; Tomsk State University; Saint Petersburg State University) , M. Ruck (Technische Universität Dresden; Technische Universität Dresden) , A. Isaeva (Technische Universität Dresden; Leibniz IFW Dresden) , F. Reinert (Universität Würzburg)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Physical Review B , VOL 100 , PAGES 121104(R)

State: Published (Approved)
Published: September 2019
Diamond Proposal Number(s): 19278 , 22468

Abstract: The layered van der Waals antiferromagnet MnBi 2 Te 4 has been predicted to combine the band ordering of archetypical topological insulators such as Bi 2 Te 3 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 MnBi 2 Te 4 (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.

Journal Keywords: Dirac fermions; Electrical properties; Topological insulators; 2-dimensional systems; Ferromagnets; Van der Waals systems; Angle-resolved photoemission spectroscopy

Subject Areas: Physics, Materials


Instruments: I05-ARPES

Other Facilities: beamline 7.0.2 (MAESTRO) at ALS; beamline 4.0.3 (Merlin) at ALS; APE beamline at Elettra; beamline P04 at PETRA III