Large Nernst Effect and Thermodynamics Properties in Weyl Antiferromagnet

Tomita, Takahiro; Ikhlas, Muhammad; Nakatsuji, Satoru

doi:10.7566/jpscp.30.011009

Large Nernst Effect and Thermodynamics Properties in Weyl Antiferromagnet

Journal Article · Wed Mar 18 00:00:00 EDT 2020 · JPS Conference Proceedings

DOI:https://doi.org/10.7566/jpscp.30.011009· OSTI ID:1832902

Tomita, Takahiro ^[1]; Ikhlas, Muhammad ^[2]; Nakatsuji, Satoru ^[3]

Univ. of Tokyo (Japan); Japan Science and Technology Agency (JST), Saitama (Japan); Johns Hopkins University
Univ. of Tokyo (Japan)
Univ. of Tokyo (Japan); Japan Science and Technology Agency (JST), Saitama (Japan)

The noncollinear antiferromagnet Mn3Sn exhibits a large anomalous Hall effect (AHE) driven by a large Berry curvature despite the vanishingly small magnetization. Theoretically, the large Berry curvature in antiferromagnets is predicted to be induced by the time-reversal breaking Weyl state in momentum space. Here, we comprehensively study the thermal conductivity, specific heat, thermoelectric power S(T), and thermomagnetic power S _ji(T) in single crystals of Mn₃Sn. Mn₃Sn exhibited a large spontaneous anomalous Nernst effect (ANE) at room temperature; in particular, the signal magnitude of Mn₃Sn exceeded 0.6 µV/K, which is comparable to that of ordinary ferromagnets. The large ANE results from the magnetic Weyl states near the Fermi level E_F and likely shares its origin with the AHE. Moreover, the possibility of Nernst-type thermoelectric modules was evaluated by analyzing the basic thermal and electric physical properties.

View Accepted Manuscript (DOE)

Research Organization:: Johns Hopkins Univ., Baltimore, MD (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division; Japan Society for the Promotion of Science (JSPS)

Grant/Contract Number:: SC0019331

OSTI ID:: 1832902

Alternate ID(s):: OSTI ID: 22997474

Journal Information:: JPS Conference Proceedings, Journal Name: JPS Conference Proceedings Vol. 30; ISSN 2435-3892

Publisher:: Physical Society of JapanCopyright Statement

Country of Publication:: United States

Language:: English

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