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TT: Fachverband Tiefe Temperaturen
TT 40: Spin Transport and Orbitronics, Spin-Hall Effects II (joint session MA/TT)
TT 40.3: Talk
Wednesday, March 19, 2025, 18:00–18:15, H19
Vectorial flow of the Berry curvature and its relation to the transport and band structure — •Jaroslav Hamrle1,2, Ondřej Stejskal1, Milan Vrána2,1, and Martin Veis2 — 1Czech Technical University, Prague, Czechia — 2Charles University, Prague, Czechia
Berry curvature expresses the curvature of the reciprocal space, in a similar manner as magnetic field express curvature of the real space, resulting in a curved transport of electrons in solids. Therefore, Berry curvature is a base of various lossless transport phenomena such as anomalous Hall effect, anomalous Nerst effect, orbital magnetization or electric polarization. Here, in model materials bcc Fe and Fe3Ga, we demonstrate details of the vectorial flow of the Berry curvature (monopole source, 1-dimensional flow, 2-dimensional flow), and its relations to the band structure, orbital magnetization as well as anomalous Hall and Nerst effects.
- [1] O. Stejskal, M. Veis, J. Hamrle, Sci Rep 12, 97 (2022) [doi: 10.1038/s41598-021-04076-z]
- [2] O. Stejskal, M. Veis, J. Hamrle, Phys. Rev. Materials 7, 084403 (2023) [doi:10.1103/PhysRevMaterials.7.084403]
Keywords: Berry curvature; flow of Berry curvature; Anomalous Hall effect