Dresden 2026 – wissenschaftliches Programm
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MM: Fachverband Metall- und Materialphysik
MM 40: Transport in Materials: Diffusion, Charge, or Heat Conduction IV
MM 40.4: Vortrag
Freitag, 13. März 2026, 11:00–11:15, SCH/A216
Nernst effect in superconducting Weyl semimetal t-PtBi2 — Federico Caglieris3, •Michele Ceccardi1, Dmitriy Efremov1, Grigory Shipunov1, Iryna Kovalchuk1,4, Saicharan Aswartham1, Arthur Veyrat1,5, Joseph Dufouleur1,7, Daniele Marré2,3, Bernd Büchner1,7, and Christian Hess1,6,7 — 1IFW Dresden — 2University of Genoa — 3CNR SPIN — 4Kyiv Academic University — 5LPS Orsay — 6Wüppertal University — 7TU Dresden
Topological materials are among the most promising areas of research in Condensed Matter Physics, offering breakthroughs in dissipationless electronics or in error-free quantum computing. The combination of non-trivial topology and superconductivity opens to novel quantum devices. The discovery of intrinsic materials where such properties appear together represent a frontier in modern condensed matter physics. Trigonal PtBi2 has recently emerged as a possible candidate, being the first example of superconducting type-I Weyl semimetal. However, several aspects of this promising compound still need to be unveiled, concerning its complicated band structure, the actual role of Weyl points in determining its electronic properties and the nature of the superconducting transition. In the work, we experimentally investigated t-PtBi2 single crystals and exfoliated flakes by means of the Nernst effect, which has been demonstrated to be a powerful probe for study the fermiology of complex materials.
Keywords: Transport properties; Nernst effect; Weyl semimetals; Surface superconductivity; Topological superconductivity