| Autor: |
Dong-Xia, Qu, Nick E, Teslich, Zurong, Dai, George F, Chapline, Thomas, Schenkel, Sean R, Durham, Jonathan, Dubois |
| Rok vydání: |
2018 |
| Zdroj: |
Physical review letters. 121(3) |
| ISSN: |
1079-7114 |
| Popis: |
Inducing superconductivity in a topological insulator can lead to novel quantum effects. However, experimental approaches to turn a topological insulator into a superconductor are limited. Here, we report on superconductivity in topological insulator Bi_{0.91}Sb_{0.09} induced via focused ion-beam deposition of a Pt thin film. The superconducting phase exhibits a Berezinski-Kosterlitz-Thouless transition, demonstrative of its two-dimensional character. From the in-plane upper critical field measurements, we estimate the superconducting thickness to be ∼17 nm for a 5.5-μm-thick sample. Our results provide evidence that the interface superconductivity could originate from the surface states of Bi_{0.91}Sb_{0.09}. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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