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Anisotropically large anomalous and topological Hall effect in a kagome magnet

Journal Article · · Physical Review. B
 [1];  [2];  [3];  [4];  [5];  [3];  [3];  [4];  [4];  [4];  [4];  [6];  [5];  [2];  [4]
  1. Idaho National Lab. (INL), Idaho Falls, ID (United States); Univ. of Central Florida, Orlando, FL (United States)
  2. Uppsala Univ. (Sweden)
  3. State Univ. of New York (SUNY), Buffalo, NY (United States)
  4. Univ. of Central Florida, Orlando, FL (United States)
  5. Idaho National Lab. (INL), Idaho Falls, ID (United States)
  6. Univ. of Genova (Italy); National Research Council (CNR), Genova (Italy). Inst. for Superconductors, Innovative Materials and Devices (CNR-SPIN)
Recently, kagome materials have become an engrossing platform to study the interplay among symmetry, magnetism, topology, and electron correlation. The latest works in RMn6Sn6 (R = rare earth metal) have illustrated that this family could be intriguing to investigate various physical phenomena due to large spin-orbit coupling and strong magnetic ordering. However, combined transport and spectroscopic studies in RMn6Sn6 materials are still limited. Here, we report magnetic, magneto-transport, and angle-resolved photoemission spectroscopy measurements of a kagome magnet ErMn6Sn6 that undergoes antiferromagnetic (TN = 345 K) to ferrimagnetic (Tc = 68 K) phase transitions. We observe a large anomalous and topological Hall effect serving as transport signatures of the nontrivial Berry curvature. Our spectroscopic results complemented by theoretical calculations show the multi-orbital kagome fermiology. This work provides new insight into the tunability and interplay of topology and magnetism in a kagome magnet.
Research Organization:
Idaho National Laboratory (INL), Idaho Falls, ID (United States)
Sponsoring Organization:
Air Force Office of Scientific Research; Swedish Research Council; USDOE Office of Nuclear Energy (NE)
Grant/Contract Number:
AC07-05ID14517
OSTI ID:
1856807
Report Number(s):
INL/JOU-21-62385-Rev000
Journal Information:
Physical Review. B, Journal Name: Physical Review. B Journal Issue: 16 Vol. 104; ISSN 2469-9950
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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