Enhancement of Ising Superconductivity in Pb<sub>1−<i>x</i> </sub>Bi<sub> <i>x</i> </sub> Ultrathin Films
Abstract Ising superconductivity has garnered much attention in recent years due to its extremely high in-plane upper critical field ( B c2 ). Here, we fabricated 14 multilayer Pb 1− x Bi x (0% ≤ x ≤ 40%) thin films on Si (111)-7 × 7 reconstructed surface by molecular beam epitaxy. Large B c2 beyond the Pauli limit is observed in all the Pb 1− x Bi x films, indicating that they may exhibit characteristics of Ising superconductivity. Moreover, the introduction of Bi doping can significantly enhance and effectively tune the in-plane B c2 of Pb 1− x Bi x films, which will help us better understand Ising superconductivity and provide a new platform for the development of tunable Ising superconductors.
Authors
- Wenhui Pang (ORCID: https://orcid.org/0000-0001-7394-9741)
- Siqi Huo (ORCID: https://orcid.org/0000-0002-6454-5208)
- Yingcai Qian
- Chuanying Xi (ORCID: https://orcid.org/0000-0003-3179-7019)
- Yuzhou Liu (ORCID: https://orcid.org/0000-0002-1109-7704)
- H. Chi (ORCID: https://orcid.org/0009-0004-9838-9233)
- Kun Xie (ORCID: https://orcid.org/0000-0002-9840-792X)
- Shengyong Qin (ORCID: https://orcid.org/0000-0002-1390-934X)
- Desheng Cai
- Yitong Gu
- Yumin Xia
- Yu Gan (ORCID: https://orcid.org/0000-0003-1706-4281)
Institutions
- University of Science and Technology of China (CN)
- Chinese Academy of Sciences (CN)
- Hefei Institutes of Physical Science (CN)
- High Magnetic Field Laboratory (CN)
- Hefei National Center for Physical Sciences at Nanoscale (CN)
Publication Details
- Journal
- Chinese Physics Letters
- Published
- 2025-04-22
- DOI
- https://doi.org/10.1088/0256-307x/42/5/057405
- Primary Topic
- Physics of Superconductivity and Magnetism
- Type
- article
- Field-Weighted Citation Impact
- 0.00