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Title: First-principles study of magnetic states and the anomalous Hall conductivity of MNb3S6 (M = Co, Fe, Mn, and Ni)

Journal Article · · Physical Review Materials
ORCiD logo [1];  [2];  [2]
  1. Argonne National Lab. (ANL), Argonne, IL (United States); Univ. of Illinois, Chicago, IL (United States)
  2. Argonne National Lab. (ANL), Argonne, IL (United States)

Here, inspired by the observation of the extremely large anomalous Hall effect in the absence of applied magnetic fields or uniform magnetization in CoNb3S6 [Nat. Commun. 9, 3280 (2018); Phys. Rev. Research 2, 023051 (2020)], we perform a first-principles study of this and related compounds of the MNb3S6 type with different transition metal M ions to determine their magnetic orders and the anomalous Hall conductivity (AHC). We find that noncoplanar antiferromagnetic ordering is favored relative to collinear or coplanar order in the case of M = Co, Fe, and Ni, while ferromagnetic ordering is favored in MnNb3S6 at low temperatures. The AHC in these materials with noncoplanar spin ordering can reach about e2/h per crystalline layer, while being negligible for coplanar and collinear cases. We also find that the AHC depends sensitively on doping and reaches a maximum for intermediate values of the local spin exchange potential between 0.3 and 0.8 eV. Our AHC results are consistent with the reported Hall measurements in CoNb3S6 and suggest a possibility of similarly large anomalous Hall effects in related compounds.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1869180
Journal Information:
Physical Review Materials, Journal Name: Physical Review Materials Journal Issue: 2 Vol. 6; ISSN 2475-9953
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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