Superconductivity in epitaxial PtSb(0001) thin films
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arXiv
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| Autores principales: | , , , , , , , , , , , , , , |
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| Formato: | Preprint |
| Publicado: |
2026
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| author | Müller, C. Bommanaboyena, S. P. Badura, A. Uchimura, T. Husstedt, F. Schwarze, B. V. Banerjee, S. Ledinský, M. Michalicka, J. Míšek, M. Šindler, M. Helm, T. Fukami, S. Krizek, F. Kriegner, D. |
| author_facet | Müller, C. Bommanaboyena, S. P. Badura, A. Uchimura, T. Husstedt, F. Schwarze, B. V. Banerjee, S. Ledinský, M. Michalicka, J. Míšek, M. Šindler, M. Helm, T. Fukami, S. Krizek, F. Kriegner, D. |
| contents | 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 $ξ_{ab}\approx 55$ nm and $ξ_c\approx 14$ 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. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2601_06504 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Superconductivity in epitaxial PtSb(0001) thin films Müller, C. Bommanaboyena, S. P. Badura, A. Uchimura, T. Husstedt, F. Schwarze, B. V. Banerjee, S. Ledinský, M. Michalicka, J. Míšek, M. Šindler, M. Helm, T. Fukami, S. Krizek, F. Kriegner, D. Superconductivity Materials Science 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 $ξ_{ab}\approx 55$ nm and $ξ_c\approx 14$ 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. |
| title | Superconductivity in epitaxial PtSb(0001) thin films |
| topic | Superconductivity Materials Science |
| url | https://arxiv.org/abs/2601.06504 |