26ème Congrès Général de la SFP

Exploring Co3Sn2S2 magnetic phase

Non programmé

20m

Centre des Congrès de la Villette (Cité des sciences et de l'Industrie, Paris)

Poster MC21 Matériaux quantiques : des prédictions à l'observation Session Poster 2: MC1, MC4, MC8, MC10, MC12, MC14, MC20, MC21, MC23, MC24, MC25, REDP

Orateur

Charles MENIL (LPEM-ESPCI)

Description

Co3Sn2S2 a kagomé semi-metallic half-metal that displays a large anomalous Hall effect [1] as well as its Nernst [2] and thermal Hall [3] counterparts. Thanks to the low density of carriers, mobility is high and quantum oscillations are easily detectable [3]. This material is known to becomes ferromagnetic below ~175 K, however its exact magnetic texture is still unclear. Proposed magnetic phases involve addition on spin glass [4], antiferromagnetic phase [5] or canting of moments [6].

1. Liu, Y.et al. Giant Anomalous Hall Effect in a Ferromagnetic Kagome-Lattice Semimetal, Nat. Phys. 14, 1125 (2018).
2. Ding, L. et al. Intrinsic anomalous Nernst effect amplified by disorder in a half-metallic semimetal. Phys. Rev. X 9, 041061 (2019).
3. Ding, L. et al. Quantum oscillations, magnetic breakdown and thermal Hall effect in Co3Sn2S2. Journal of Physics D: Applied Physics 54, 454003 (2021).
4. Lachman, E., Murphy, R. A., Maksimovic, N., Kealhofer, R., Haley, S., McDonald, R. D., ... & Analytis, J. G. (2020). Exchange biased anomalous Hall effect driven by frustration in a magnetic kagome lattice. Nature communications, 11(1), 560.
5. Guguchia, Z., Verezhak, J. A. T., Gawryluk, D. J., Tsirkin, S. S., Yin, J. X., Belopolski, I., ... & Hasan, M. Z. (2020). Tunable anomalous Hall conductivity through volume-wise magnetic competition in a topological kagome magnet. Nature communications, 11(1), 559.
6. Živković, I., Yadav, R., Soh, J. R., Yi, C., Shi, Y., Yazyev, O. V., & Rønnow, H. M. (2022). Unraveling the origin of the peculiar transition in the magnetically ordered phase of the Weyl semimetal Co3Sn2S2. Physical Review B, 106(18), L180403.