Berlin 2024 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 18: Superconductivity: Poster
TT 18.19: Poster
Montag, 18. März 2024, 15:00–18:00, Poster C
High-field torque and magnetotransport in UTe2 single crystals — •Freya Husstedt1,2, Beat Valentin Schwarze1,2, Jean-Pascal Brison3, Georg Knebel3, Motoi Kimata4, Dai Aoki4, Toni Helm1, and J. Wosnitza1 — 1Hochfeld-Magnetlabor Dresden (HLD-EMFL) and Würzburg-Dresden Cluster of Excellence ct.qmat, HZDR, Germany — 2Institut für Festkörper- und Materialphysik, TU Dresden, Germany — 3Centre CEA de Grenoble, France — 4Institute for Materials Research, Tohoku University, Japan
To date, the structure of the Fermi surfaces of the heavy-fermion superconductor UTe2 is strongly debated [1]. We performed angle-dependent magnetic-torque and magnetotransport measurements on high-quality UTe2 single crystals with Tc = 2 K. We observe quantum oscillations starting at about 15 T. The de Haas-van Alphen frequencies show very good agreement with previous reports [2, 3]. We compare our results to band-structure calculations performed with the full potential-local orbital code. The hysteretic response of magnetic torque in the superconducting phase and the transition in magnetoresistance provided further details about the anisotropic H-T phase diagram of UTe2.
[1] D. Aoki et al., J. Phys.: Condens. Matter 34, 243002 (2022).
[2] D. Aoki et al., J. Phys. Soc. Jpn. 91, 083704 (2022).
[3] A. G. Eaton et al., arXiv preprint arXiv:2302.04758 (2023).
Keywords: unconventional superconductors; high magnetic fields; electronic structure; heavy fermions