| Autor: |
Joseph A, Hlevyack, Sahand, Najafzadeh, Meng-Kai, Lin, Takahiro, Hashimoto, Tsubaki, Nagashima, Akihiro, Tsuzuki, Akiko, Fukushima, Cédric, Bareille, Yang, Bai, Peng, Chen, Ro-Ya, Liu, Yao, Li, David, Flötotto, José, Avila, James N, Eckstein, Shik, Shin, Kozo, Okazaki, T-C, Chiang |
| Rok vydání: |
2020 |
| Zdroj: |
Physical review letters. 124(23) |
| ISSN: |
1079-7114 |
| Popis: |
Interfacing bulk conducting topological Bi_{2}Se_{3} films with s-wave superconductors initiates strong superconducting order in the nontrivial surface states. However, bulk insulating topological (Bi_{1-x}Sb_{x})_{2}Te_{3} films on bulk Nb instead exhibit a giant attenuation of surface superconductivity, even for films only two layers thick. This massive suppression of proximity pairing is evidenced by ultrahigh-resolution band mappings and by contrasting quantified superconducting gaps with those of heavily n-doped topological Bi_{2}Se_{3}/Nb. The results underscore the limitations of using superconducting proximity effects to realize topological superconductivity in nearly intrinsic systems. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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