Superconductivity in epitaxial PtSb(0001) thin films
Building on earlier reports of superconductivity in bulk PtSb, we present a systematic study of superconductivity in epitaxial PtSb(0001) thin films grown on SrF 2 ( 111 ) . Electrical transport measurements reveal a superconducting transition at T c = 1.72 K . The field-induced broadening of the transition and the temperature dependence of the upper critical fields are consistent with type-II superconductivity. We determine the upper critical fields for magnetic fields applied perpendicular and parallel to the film plane and parametrize their temperature dependence using an anisotropic Ginzburg-Landau approach. For a representative film in the intermediate thickness regime ( d = 50 n m ), we obtain coherence lengths of ξ a b ≈ 56 n m and ξ c ≈ 14 n m . Current-voltage characteristics show sizable critical currents, with a critical current density reaching J c ≈ 6 × 10 4 A / cm 2 at 0.5 K . These results establish the superconducting properties of epitaxial PtSb thin films and provide a basis for lattice-matched heterostructures within the NiAs-type materials family.
Authors
- Filip Křížek (ORCID: https://orcid.org/0000-0002-2697-8256)
- Carsten Timm (ORCID: https://orcid.org/0000-0002-0279-0267)
- Shunsuke Fukami (ORCID: https://orcid.org/0000-0001-5750-2990)
- M. Šindler (ORCID: https://orcid.org/0000-0003-1547-4754)
- Petr Proschek (ORCID: https://orcid.org/0000-0003-2627-3544)
- Dominik Kriegner (ORCID: https://orcid.org/0000-0001-6961-6581)
- Toni Helm (ORCID: https://orcid.org/0000-0002-0938-8537)
- F. Husstedt
- B. V. Schwarze
- S. Banerjee
- C. Müller
- M. Míšek
- T. Uchimura
- M. Ledinský
- A. Badura
- J. Michalicka
- S. P. Bommanaboyena
Institutions
- Tohoku University (JP)
- Charles University (CZ)
- Helmholtz-Zentrum Dresden-Rossendorf (DE)
- Complexity and Topology in Quantum Matter (DE)
- FZU ‒ Institute of Physics of the Academy of Sciences of the Czech Republic (CZ)
- Innovation Cluster (Canada) (CA)
- Czech Technical University in Prague (CZ)
- Technische Universität Dresden (DE)
Publication Details
- Journal
- Physical Review Materials
- Published
- 2026-09-04
- DOI
- https://doi.org/10.1103/zjt7-88m9
- Primary Topic
- Surface and Thin Film Phenomena
- Type
- article
- Field-Weighted Citation Impact
- 0.00
Funders
- Deutsche Forschungsgemeinschaft
- Ministerstvo Školství, Mládeže a Tělovýchovy
- Grantová Agentura České Republiky
- Akademie Věd České Republiky
- European Research Council