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TT: Fachverband Tiefe Temperaturen
TT 38: Topological Semimetals I
TT 38.3: Talk
Wednesday, March 20, 2024, 10:00–10:15, H 3010
Electronic structure in the Dirac nodal-line semimetals TaNiTe5 and TaPtTe5 — •Maximilian Daschner1, Friedrich Malte Grosche1, and Ivan Kokanović1,2 — 1Cavendish Laboratory, University of Cambridge, Cambridge CB3 OHE, United Kingdom — 2Department of Physics, Faculty of Science, University of Zagreb, Zagreb, Croatia
Among the nodal-line semimetals (NLSMs), Dirac nodal lines (DNLs) that are robust against spin-orbit coupling (SOC) rarely occur in (quasi) one-dimensional materials. A family of exfoliable, strong in-plane anisotropic, nonmagnetic, ternary transition semimetal tellurides, Ta-based TaMTe5 (M=Ni, Pt) [1,2], has recently been shown to host nodal lines with fourfold degeneracy.
Here [3] we investigated the Fermi surface and carrier mass in TaNiTe5 and TaPtTe5 using magnetization and magnetic torque measurements in high-quality single crystals at fields of up to 15T. Quantum oscillations have been tracked for fields along the three crystallographic axes, supplemented by rotation studies in the b-a and b-c planes, and were interpreted with reference to band structure calculations within density functional theory.
[1] Z. Hao et al., Phys. Rev. B 104 (2021) 115158
[2] S. Xiao et al., Phys. Rev. B 105 (2022) 195145
[3] M. Daschner et al., submitted (2023)
Keywords: one-dimensional; Dirac nodal-line; de Haas-van Alphen; quantum oscillation