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Temperature dependence of surface superconductivity in t-PtBi₂

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arxiv 2507.10187 v1 pith:RPVOPUDJ submitted 2025-07-14 cond-mat.supr-con

Temperature dependence of surface superconductivity in t-PtBi$_2$

Julia Besproswanny , Sebastian Schimmel , Yanina Fasano , Grigory Shipunov , Saicharan Aswartham , Danny Baumann , Bernd B\"uchner , Christian Hess This is my paper
classification cond-mat.supr-con
keywords superconductivityapproxmaterialsuperconductingsurfacet-ptbitemperaturearound
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abstract

The Weyl semimetal trigonal PtBi$_2$ 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 $\Delta \approx 9\,$meV and a closing of the gap around $T_c \approx 45\,$K is observed. Thus, our results confirm the previously indicated high $T_c$-like superconductivity in t-PtBi$_2$.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. A minimal model for the Weyl nodes and Fermi arcs of PtBi$_2$

    cond-mat.supr-con 2026-07 conditional novelty 6.0

    A minimal two-orbital continuum model constrained by C3v and time-reversal symmetries reproduces PtBi2 Weyl-node evolution under SOC, node annihilations, and Fermi-arc spin texture.

  2. Three prerequisites for high-temperature superconductivity in t-PtBi$_2$

    cond-mat.supr-con 2025-09 conditional novelty 5.0

    ARPES and DFT show that t-PtBi2 surface Fermi arcs host a van Hove singularity and a momentum-dependent flat band, with spatially varying arc size that could tune superconductivity.