Berlin 2024 – scientific programme
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TT: Fachverband Tiefe Temperaturen
TT 45: PtBi2 and Weyl Superconductors
TT 45.2: Talk
Wednesday, March 20, 2024, 11:45–12:00, H 3010
Topology and superconductivity in trigonal-PtBi2 — •Jiang Qu, Ankit Kumar, Arthur Veyrat, Louis Veyrat, Romain Giraud, Bernd Büchner, and Joseph Dufouleur — Leibniz-Institute for Solid State and Materials Research (IFW Dresden), Helmholtzstraße 20, 01069 Dresden, Germany and Würzburg-Dresden Cluster of Excellence ct.qmat, Technische Universität Dresden, 01062 Dresden, Germany
The layered type-I Weyl semimetal trigonal-PtBi2 (t-PtBi2) is a promising candidate for topological superconductors with broken inversion symmetry and strong spin-orbit coupling. In this talk, we first present methods developed to exfoliate t-PtBi2 into thin layers with a modified mechanical exfoliation technique. We then focus on the result of the investigations of the low dimensional superconductivity in t-PtBi2 exfoliated flakes by transport measurements [1]. Finally, we present a complete study of magnetoresistance above the superconducting transition for a magnetic field oriented in any direction, highlighting the highly untrivial properties of this material.
[1] A. Veyrat et al., Nano Lett. 23 (2023) 1229 and arxive:2101.01620
Keywords: Topological superconductivity; two-dimensional materials; trigonal-PtBi2; Weyl semimetals