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

Autor: Vidal, R. C., Bentmann, Hendrik, Peixoto, T. R. F., Zeugner, Alexander, Moser, S., Min, C. H., Schatz, S., Kißner, K., Ünzelmann, M., Fornari, C. I., Vasili, Hari Babu, Valvidares, Manuel, Sakamoto, K., Fujii, Jun, Vobornik, Ivana, Jung, S., Cacho, Cephise, Kim, T. K., Koch, Roland J., Jozwiak, C, Bostwick, A., Denlinger, J. D., Rotenberg, E., Buck, J., Hoesch, Moritz, Diekmann, F., Rohlf, S., Kalläne, M., Rossnagel, K., Otrokov, M. M., Chulkov, Eugene V., Ruck, M., Isaeva, Anna, Reinert, Friedrich
Přispěvatelé: Ministerio de Economía y Competitividad (España), Tomsk State University, Saint Petersburg State University, Russian Foundation for Basic Research, Swiss National Science Foundation, Diputación Foral de Guipúzcoa
Rok vydání: 2019
Zdroj: Digital.CSIC. Repositorio Institucional del CSIC
instname
Popis: 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.
We acknowledge financial support from the DFG through SFB1170 ’Tocotronics’, SFB1143 ’Correlated Magnetism’, SPP 1666 ’Topological insulators’, ERA-Chemistry Programm (RU-776/15-1), and the Wurzburg-Dresden Cluster of ¨Excellence on Complexity and Topology in Quantum Matter – ct.qmat (EXC 2147, project-id 39085490). We also acknowledge the support by Spanish Ministerio de Economia y Competitividad (MINECO Grant No. FIS2016-75862-P), Academic D.I. Mendeleev Fund Program of Tomsk State University (Project No. 8.1.01.2018), the Saint Petersburg State University grant for scientic investigations (Grant No. 15.61.202.2015), and Russian Foundation for Basic Research (Grant No. 18-52-06009). S.M. acknowledges support by the Swiss National Science Foundation (Grant No. P300P2-171221). This research used resources of the Advanced Light Source, which is a DOE Office of Science User Facility under contract no. DE-AC02-05CH11231. We acknowledge Diamond Light Source for access to beamline I05 (proposals No. SI19278 and No. SI22468) that contributed to the results presented here. Parts of this research were carried out at PETRA III (DESY, Hamburg, Germany) under Proposal No. I-20180510. This work has been partly performed in the framework of the Nanoscience Foundry and Fine Analysis (NFFA-MIUR, Italy) facility. M.M.O. acknowledges support by the Diputacion Foral de Gipuzkoa ((SAREA 2018 - RED ´2018, project no. 2018-CIEN-000025-01).
Databáze: OpenAIRE
Externí odkaz: