Sprecher
Beschreibung
Topological quantum materials have attracted enormous attention since their discovery due to the observed anomalous transport properties, which originate from the 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 points [1]. It is widely believed that the magnetic structure and Weyl properties are intimately connected.
Nevertheless, the interpretation of negative longitudinal magnetoresistance (LMR), AHE, and PHE in Mn₃X compounds—particularly their connection to the chiral magnetic effect—remains a subject of ongoing debate. This presentation provides a concise overview of current insights into these phenomena, with a focus on experimental observations in Mn₃Sn and Mn₃Ge using neutron diffraction and complementary physical property measurement systems.
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)
