Dresden 2026 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 47: Altermagnets V
MA 47.7: Vortrag
Donnerstag, 12. März 2026, 16:45–17:00, HSZ/0002
High-field magnetotransport and quantum oscillations in altermagnetic CrSb — •Sajal Naduvile Thadathil1,2, B. V. Schwarze1, T. Kotte1, M. Uhlarz1, C. Muller3,4, P. Ritzinger3,4, K. Vyborny3, T. Speliotis5, J. Pospisil4, R. G. Hernandez6, H. Reichlova3, D. Kriegner3, J. Wosnitza1,2, and T. Helm1 — 1Dresden High Magnetic Field Laboratory (HLD-EMFL), HZDR, Germany — 2Institute of Solid-State and Materials Physics, TU Dresden, Germany — 3Institute of Physics ASCR, Czech Republic — 4Charles University, Czech Republic — 5Institute of Nanoscience and Nanotechnology, Greece — 6Universidad del Norte, Colombia
Within the family of altermagnets, CrSb is a metallic, collinearly ordered material that exhibits particularly strong symmetry-induced spin splitting in its band structure. In this study, we combine electrical magnetotransport measurements up to 70 T on microfabricated single-crystalline CrSb with first-principles calculations to investigate its Fermi surface. Our experiments reveal a non-saturating magnetoresistance and nonlinear Hall resistivity consistent with multiband charge transport. Notably, we report the observation of Shubnikov-de Haas quantum oscillations in CrSb. Band-structure calculations, when compared with our measurements, accurately reproduce the expected Fermi-surface geometry. These results confirm the predicted electronic band structure of CrSb, establish robust multi-charge-carrier transport at high fields, and highlight the importance of high-field experiments for mapping electronic band structures of altermagnets.
Keywords: Altermagnets; CrSb; Pulse-field electrical magnetotransport; Fermi surfaces; Quantum oscillations