Temperature dependence of surface superconductivity in t-PtBi₂

2025/07/14 by Besproswanny, Julia, Schimmel, Sebastian, Fasano, Yanina +5 · 1 citation
#FOS: Physical sciences #Superconductivity (cond-mat.supr-con)

paper · doi:10.48550/arxiv.2507.10187

Abstract

The Weyl semimetal trigonal PtBi₂ has recently been identified as a promising candidate material for intrinsic topological surface superconductivity emerging from the Fermi arc states of the material with a sizeable superconducting gap. We report the temperature evolution of the superconducting excitation spectrum using scanning tunneling spectroscopy in the range of 8-45 K. A large low-temperature gap in the order of Δ≈ 9 meV and a closing of the gap around T_c ≈ 45 K is observed. Thus, our results confirm the previously indicated high T_c-like superconductivity in t-PtBi₂.

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