Potential Fu–Kane Topological Superconductor Island in Bi<sub>2</sub>Te<sub>3</sub>/VSi<sub> <i>x</i> </sub>/Si Nanostructure
Abstract Topological superconductor islands are thought to be the building blocks of topological quantum bits. We produced single-crystalline VSi x islands with well-defined side facets and island size more than 200 nm using molecular beam epitaxy on Si substrate heated to 950 °C throughout the growth process. By means of scanning tunneling spectroscopy, we revealed dynamical Coulomb blockade and superconductivity on isolated islands and on islands being connected by superconducting wetting layer respectively. Bi 2 Te 3 films were further deposited on VSi x islands. Robust and homogenous proximity effect induced superconductivity was observed on various facets of the Bi 2 Te 3 /VSi x hetero-nanostructure. Furthermore, our high-resolution spectroscopy identified Bosonic mode excitations on the topological superconductor islands. These results may establish a playground for the vortex Majorana islands.
Authors
- Jinfeng Jia
- Peiyuan Cai (ORCID: https://orcid.org/0000-0001-6766-9356)
- Shiyong Wang (ORCID: https://orcid.org/0000-0001-6603-9926)
- Jinghua Sun (ORCID: https://orcid.org/0000-0001-6420-107X)
- Dandan Guan (ORCID: https://orcid.org/0000-0002-3714-8813)
- Yi Gu (ORCID: https://orcid.org/0000-0002-1211-2654)
- Xuhui Ning (ORCID: https://orcid.org/0000-0003-0561-3511)
- Qiaoyan Yu (ORCID: https://orcid.org/0000-0002-7232-8529)
- Yaoyi Li (ORCID: https://orcid.org/0000-0002-0054-4054)
- Canhua Liu (ORCID: https://orcid.org/0000-0003-2240-3559)
- Tongqiao Miao (ORCID: https://orcid.org/0000-0002-7521-9002)
- Hao Zheng (ORCID: https://orcid.org/0000-0002-6495-874X)
- Xian Du
- Ruijun Xi
- Pengyu Hu (ORCID: https://orcid.org/0000-0003-0251-0453)
- Liang Liu (ORCID: https://orcid.org/0000-0001-8339-468X)
- Xi Chen (ORCID: https://orcid.org/0000-0002-9525-4737)
- Yi Zhang (ORCID: https://orcid.org/0000-0003-1204-8717)
- Xiaoxue Liu (ORCID: https://orcid.org/0000-0001-8761-4010)
- Yi Zhou (ORCID: https://orcid.org/0000-0003-3855-1871)
- Hao Yang (ORCID: https://orcid.org/0000-0002-1442-2971)
- Dang Liu (ORCID: https://orcid.org/0000-0002-1127-7836)
- Shasha Xue
Institutions
- Shanghai Jiao Tong University (CN)
- Southern University of Science and Technology (CN)
- Institute of Physics (CN)
- University of Chinese Academy of Sciences (CN)
- Quantum Science Center of Guangdong-Hong Kong-Macao Greater Bay Area (CN)
Publication Details
- Journal
- Chinese Physics Letters
- Published
- 2025-03-01
- DOI
- https://doi.org/10.1088/0256-307x/42/3/037403
- Citations
- 1
- Primary Topic
- Topological Materials and Phenomena
- Type
- article
- Field-Weighted Citation Impact
- 1.25