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Title: Tetrahedral triple-Q magnetic ordering and large spontaneous Hall conductivity in the metallic triangular antiferromagnet Co1/3TaS2

Journal Article · · Nature Communications
ORCiD logo [1];  [2]; ORCiD logo [2]; ORCiD logo [2]; ORCiD logo [3]; ORCiD logo [4]; ORCiD logo [5]; ORCiD logo [6]; ORCiD logo [7];  [8];  [9];  [9];  [9]; ORCiD logo [3];  [10]; ORCiD logo [11]; ORCiD logo [2]
  1. Seoul National Univ. (Korea, Republic of); OSTI
  2. Seoul National Univ. (Korea, Republic of)
  3. Korea Advanced Inst. Science and Technology (KAIST), Daejeon (Korea, Republic of)
  4. Australian Nuclear Science and Technology Organisation (ANSTO), Lucas Heights, NSW (Australia); Univ. of Sydney, NSW (Australia)
  5. Paul Scherrer Inst. (PSI), Villigen (Switzerland)
  6. Comprehensive research Organization for Science and Society (CROSS) Tokai, Ibaraki (Japan)
  7. Japan Atomic Energy Agency (JAEA), Tokai, Ibaraki (Japan)
  8. Incheon National University (Korea, Republic of)
  9. Chonnam National Univ., Gwangju (Korea, Republic of)
  10. Univ. of Minnesota, Minneapolis, MN (United States)
  11. Univ. of Tennessee, Knoxville, TN (United States)
+ Show Author Affiliations

The triangular lattice antiferromagnet (TLAF) has been the standard paradigm of frustrated magnetism for several decades. The most common magnetic ordering in insulating TLAFs is the 120° structure. However, a new triple-Q chiral ordering can emerge in metallic TLAFs, representing the short wavelength limit of magnetic skyrmion crystals. We report the metallic TLAF Co1/ 3TaS2 as the first example of tetrahedral triple-Q magnetic ordering with the associated topological Hall effect (non-zero σxy(H = 0)). We also present a theoretical framework that describes the emergence of this magnetic ground state, which is further supported by the electronic structure measured by angle-resolved photoemission spectroscopy. Additionally, our measurements of the inelastic neutron scattering cross section are consistent with the calculated dynamical structure factor of the tetrahedral triple-Q state.

Research Organization:
Univ. of Tennessee, Knoxville, TN (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES); Samsung Science and Technology Foundation; National Research Foundation of Korea
Grant/Contract Number:
SC0022311
OSTI ID:
2472329
Journal Information:
Nature Communications, Journal Name: Nature Communications Journal Issue: 1 Vol. 14; ISSN 2041-1723
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English

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