Superconductivity in Tin Telluride Films Grown by Molecular Beam Epitaxy
Abstract The intersection of superconductivity and ferroelectricity hosts a wide range of exotic quantum phenomena. Here, we report on the observation of superconductivity in high-quality tin telluride films grown by molecular beam epitaxy. Unintentionally doped tin telluride undergoes a ferroelectric transition at ~100 K. The critical temperature of superconductivity increases monotonically with indium concentration. The critical field of superconductivity, however, does not follow the same behavior as critical temperature with indium concentration and exhibits a carrier-density-dependent violation of the Pauli limit. The electron–phonon coupling, according to the McMillan formula, exhibits a systematic enhancement with indium concentration, suggesting a potential violation of Bardeen–Cooper–Schrieffer (BCS) weak coupling at high indium concentrations.
Authors
- Kasra Sardashti (ORCID: https://orcid.org/0000-0002-5781-1723)
- Salva Salmani‐Rezaie (ORCID: https://orcid.org/0000-0002-9349-8391)
- Deepak Sapkota (ORCID: https://orcid.org/0000-0001-9801-9196)
- David A. Muller (ORCID: https://orcid.org/0000-0003-4129-0473)
- Samuel J. Poage
- Shalinee Chikara (ORCID: https://orcid.org/0000-0002-8819-4465)
- M. D. Williams (ORCID: https://orcid.org/0000-0002-3688-6144)
- Kaveh Ahadi (ORCID: https://orcid.org/0000-0003-2280-4037)
- Antonio G. González (ORCID: https://orcid.org/0000-0003-0013-9881)
- Bernardo Langa
Institutions
- North Carolina State University (US)
- Cornell University (US)
- National High Magnetic Field Laboratory (US)
- Clark Atlanta University (US)
- The Ohio State University (US)
- Clemson University (US)
Publication Details
- Journal
- Journal of Electronic Materials
- Published
- 2025-04-29
- DOI
- https://doi.org/10.1007/s11664-025-11908-5
- Citations
- 2
- Primary Topic
- Topological Materials and Phenomena
- Type
- article
- Field-Weighted Citation Impact
- 2.49
Funders
- National Science Foundation
- National High Magnetic Field Laboratory
- Cornell Center for Materials Research
- Materials Research Science and Engineering Center, Harvard University
- Division of Materials Research
- High Magnetic Field Laboratory, Chinese Academy of Sciences