dorsal/arxiv
View SchemaSuperconductivity in epitaxial PtSb(0001) thin films
| Authors | C. Müller, S. P. Bommanaboyena, A. Badura, T. Uchimura, F. Husstedt, B. V. Schwarze, S. Banerjee, M. Ledinský, J. Michalicka, M. Míšek, M. Šindler, T. Helm, S. Fukami, F. Krizek, D. Kriegner |
|---|---|
| Categories | |
| ArXiv ID | 2601.06504vv1 |
| URL | https://arxiv.org/abs/2601.06504 |
| License | http://creativecommons.org/licenses/by/4.0/ |
Abstract
We report superconductivity in epitaxial PtSb(0001) thin films grown on SrF2(111). Electrical transport measurements reveal a superconducting transition at $T_{\mathrm c}=1.72$ K. The field-induced broadening of the transition and the presence of finite upper critical fields are consistent with type-II superconductivity. We determine the resistively defined upper critical fields for magnetic fields applied perpendicular and parallel to the film plane and parameterize their temperature dependence using an anisotropic Ginzburg-Landau approach. For the thickest film ($d=50$ nm), this yields coherence lengths of $\xi_{ab}\approx 55$ nm and $\xi_c\approx 14$ nm. Current-voltage characteristics show sizeable critical currents, with a critical current density reaching $J_{\mathrm c}\approx 6e4$ A/cm$^2$ at 0.5 K. These results establish epitaxial PtSb as a superconducting thin-film platform compatible with lattice-matched heterostructures in the NiAs-type materials family.
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"abstract": "We report superconductivity in epitaxial PtSb(0001) thin films grown on SrF2(111). Electrical transport measurements reveal a superconducting transition at $T_{\\mathrm c}=1.72$ K. The field-induced broadening of the transition and the presence of finite upper critical fields are consistent with type-II superconductivity. We determine the resistively defined upper critical fields for magnetic fields applied perpendicular and parallel to the film plane and parameterize their temperature dependence using an anisotropic Ginzburg-Landau approach. For the thickest film ($d=50$ nm), this yields coherence lengths of $\\xi_{ab}\\approx 55$ nm and $\\xi_c\\approx 14$ nm. Current-voltage characteristics show sizeable critical currents, with a critical current density reaching $J_{\\mathrm c}\\approx 6e4$ A/cm$^2$ at 0.5 K. These results establish epitaxial PtSb as a superconducting thin-film platform compatible with lattice-matched heterostructures in the NiAs-type materials family.",
"arxiv_id": "2601.06504",
"authors": [
"C. M\u00fcller",
"S. P. Bommanaboyena",
"A. Badura",
"T. Uchimura",
"F. Husstedt",
"B. V. Schwarze",
"S. Banerjee",
"M. Ledinsk\u00fd",
"J. Michalicka",
"M. M\u00ed\u0161ek",
"M. \u0160indler",
"T. Helm",
"S. Fukami",
"F. Krizek",
"D. Kriegner"
],
"categories": [
"cond-mat.supr-con",
"cond-mat.mtrl-sci"
],
"license": "http://creativecommons.org/licenses/by/4.0/",
"title": "Superconductivity in epitaxial PtSb(0001) thin films",
"url": "https://arxiv.org/abs/2601.06504",
"version": "v1"
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