Temperature dependence of surface superconductivity in t-PtBi$_2$
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arXiv
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| Hauptverfasser: | , , , , , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866918091111268352 |
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| author | Besproswanny, Julia Schimmel, Sebastian Fasano, Yanina Shipunov, Grigory Aswartham, Saicharan Baumann, Danny Büchner, Bernd Hess, Christian |
| author_facet | Besproswanny, Julia Schimmel, Sebastian Fasano, Yanina Shipunov, Grigory Aswartham, Saicharan Baumann, Danny Büchner, Bernd Hess, Christian |
| contents | 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 $Δ\approx 9\,$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$_2$. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2507_10187 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Temperature dependence of surface superconductivity in t-PtBi$_2$ Besproswanny, Julia Schimmel, Sebastian Fasano, Yanina Shipunov, Grigory Aswartham, Saicharan Baumann, Danny Büchner, Bernd Hess, Christian Superconductivity 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 $Δ\approx 9\,$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$_2$. |
| title | Temperature dependence of surface superconductivity in t-PtBi$_2$ |
| topic | Superconductivity |
| url | https://arxiv.org/abs/2507.10187 |