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Thermal and thermoelectric properties of an antiferromagnetic topological insulator MnBi2 Te4

Journal Article · · Physical Review. B
 [1];  [2];  [3];  [3];  [2]
  1. Michigan State University, East Lansing, MI (United States); OSTI
  2. Michigan State University, East Lansing, MI (United States)
  3. Pennsylvania State University, University Park, PA (United States)

The discovery of an intrinsic antiferromagnetic topological insulator (AFMTI) in MnBi2Te4 has attracted intense attention, most of which lies in its electrical properties. Here in this paper, we report electronic, thermal, and thermoelectric transport studies of this newly found AFMTI. The temperature and magnetic field dependence of its resistivity, thermal conductivity, and Seebeck coefficient indicate strong coupling between charge, lattice, and spin degrees of freedom in this system. Furthermore, MnBi2Te4 exhibits a large anomalous Nernst signal, which is associated with nonzero Berry curvature of the field-induced canted antiferromagnetic state.

Research Organization:
Michigan State University, East Lansing, MI (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division (MSE); Michigan State University; National Science Foundation (NSF)
Grant/Contract Number:
SC0019259
OSTI ID:
1979756
Alternate ID(s):
OSTI ID: 2573035
Journal Information:
Physical Review. B, Journal Name: Physical Review. B Journal Issue: 18 Vol. 105; ISSN 2469-9950
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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