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Antiferromagnetic order in the layered magnetic topological insulator MnBi2⁢Se4 probed by resonant soft x-ray scattering

Journal Article · · Physical Review. B
 [1];  [2];  [3];  [2];  [2];  [4];  [5];  [6];  [7];  [3];  [8];  [2]
  1. Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States); University of California, Berkeley, CA (United States); Sun Yat-Sen Univ., Guangzhou (China)
  2. Univ. of California, San Diego, CA (United States)
  3. Department of Physics, The Ohio State University, Columbus, Ohio 43210, USA
  4. University of California, Berkeley, CA (United States)
  5. Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States); University of California, Berkeley, CA (United States); Yale Univ., New Haven, CT (United States)
  6. Department of Physics, University of California, San Diego, California 92093, USA
  7. Helmholtz-Zentrum Berlin für Materialen und Energie, BESSY II, D-12489 Berlin, Germany
  8. Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States); University of California, Berkeley, CA (United States)
The quasi-two-dimensional magnetic topological insulator MnBi2Se4, stabilized via nonequilibrium molecular beam epitaxy, is investigated by resonant soft x-ray scattering. Kiessig fringes are observed, confirming a high sample quality and a thin film thickness of 10 septuple layers (∼13 nm). An antiferromagnetic Bragg peak is observed at the structurally forbidden reflection, whose magnetic nature is validated by studying its temperature, energy, and polarization dependence. Through a detailed analysis, an A-type antiferromagetic order with in-plane moments is implied. This alternative spin structure in MnBi2Se4, in contrast to the Ising antiferromagnetic states in other magnetic topological insulators, might be relevant for hosting new topological states.
Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
National Science Foundation (NSF); US Air Force Office of Scientific Research (AFOSR); USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE Office of Science (SC), Basic Energy Sciences (BES), Materials Sciences & Engineering Division
Grant/Contract Number:
AC02-05CH11231; SC0016379
OSTI ID:
2406223
Alternate ID(s):
OSTI ID: 2356927
Journal Information:
Physical Review. B, Journal Name: Physical Review. B Journal Issue: 18 Vol. 109; ISSN 2469-9950
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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