Anomalous transport due to Weyl fermions in the chiral antiferromagnets Mn3X, X = Sn, Ge

Taishi Chen, Takahiro Tomita, Susumu Minami, Mingxuan Fu, Takashi Koretsune, Motoharu Kitatani, Ikhlas Muhammad, Daisuke Nishio-Hamane, Rieko Ishii, Fumiyuki Ishii, Ryotaro Arita and Satoru Nakatsuji ()
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Taishi Chen: University of Tokyo
Takahiro Tomita: University of Tokyo
Susumu Minami: University of Tokyo
Mingxuan Fu: University of Tokyo
Takashi Koretsune: Tohoku University
Motoharu Kitatani: RIKEN Center for Emergent Matter Science (CEMS)
Ikhlas Muhammad: University of Tokyo
Daisuke Nishio-Hamane: University of Tokyo
Rieko Ishii: University of Tokyo
Fumiyuki Ishii: RIKEN Center for Emergent Matter Science (CEMS)
Ryotaro Arita: CREST, Japan Science and Technology Agency (JST)
Satoru Nakatsuji: University of Tokyo

Nature Communications, 2021, vol. 12, issue 1, 1-14

Abstract: Abstract The recent discoveries of strikingly large zero-field Hall and Nernst effects in antiferromagnets Mn3X (X = Sn, Ge) have brought the study of magnetic topological states to the forefront of condensed matter research and technological innovation. These effects are considered fingerprints of Weyl nodes residing near the Fermi energy, promoting Mn3X (X = Sn, Ge) as a fascinating platform to explore the elusive magnetic Weyl fermions. In this review, we provide recent updates on the insights drawn from experimental and theoretical studies of Mn3X (X = Sn, Ge) by combining previous reports with our new, comprehensive set of transport measurements of high-quality Mn3Sn and Mn3Ge single crystals. In particular, we report magnetotransport signatures specific to chiral anomalies in Mn3Ge and planar Hall effect in Mn3Sn, which have not yet been found in earlier studies. The results summarized here indicate the essential role of magnetic Weyl fermions in producing the large transverse responses in the absence of magnetization.

Date: 2021
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Persistent link: https://EconPapers.repec.org/RePEc:nat:natcom:v:12:y:2021:i:1:d:10.1038_s41467-020-20838-1

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DOI: 10.1038/s41467-020-20838-1

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