Talk (non-conference) (Invited)

FZJ-2025-05070

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Magnetic and Transport Properties of Mn3X (X = Ge, Sn) Weyl Semimetal

Nandi, S.FZJ*

2025

Abstract: Topological quantum materials have garnered considerable attention since their discovery, owing to the observed anomalous transport properties that originate from their non-zero Berry curvature. Mn3X compounds show interesting physical properties like Anomalous Hall Effect (AHE), Planar Hall effect (PHE), chiral magnetic effect, and non-local transport properties due to non-vanishing Berry flux emerging from the Weyl points1. It is widely believed that the magnetic structure and Weyl properties are intimately connected.However, the observation of negative longitudinal magnetoresistance (LMR), AHE, and PHE in Mn3X compounds and its connection with the chiral magnetic effect is much debated in the literature. In this talk, I will give a brief overview of the current understanding of the negative LMR, AHE, and PHE as observed in Mn3Sn and Mn3Ge compounds.References:[1] S. Nakatsuji, N. Kiyohara and T. Higo, Nature (London) 527, 212 (2015)[2] Y. Song, Y. Hao, and S. Wang, Phys. Rev. B 101, 144422 (2020) [3] A. K. Nayak, J. E. Fischer, Y. Sun, B. Yan, J. Karel, A. C. Komarek, C. Shekhar, N. Kumar, W. Schnelle, J. Kübler, C. Felser, and S. S. P. Parkin, Sci. Adv. 2, e1501870 (2016) [4] N. Kumar, S. N. Guin, C. Felser, and C. Shekhar, Phys. Rev. B 98, 041103(R) (2018)

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Contributing Institute(s):

1. Streumethoden (JCNS-2)
2. JARA-FIT (JARA-FIT)

Research Program(s):

1. 632 - Materials – Quantum, Complex and Functional Materials (POF4-632) (POF4-632)
2. 6G4 - Jülich Centre for Neutron Research (JCNS) (FZJ) (POF4-6G4) (POF4-6G4)

Appears in the scientific report 2025

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