Protected gap closing in Josephson trijunctions constructed on Bi2Te3
Guang Yang, Zhaozheng Lyu, Junhua Wang, Jianghua Ying, Xiang Zhang, Jie Shen, Guangtong Liu, Jie Fan, Zhongqing Ji, Xiunian Jing, Fanming Qu, Li Lu
DOI 10.1103/PhysRevB.100.180501 · Physical Review B
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Abstract
We carried out a phase-sensitive experiment on Josephson trijunctions constructed on the surface of three-dimensional topological insulator Bi2Te3. Through local flux contol and contact resistance measurement, we observed that the minigap at the ends of the trijunctions approaches zero linearly with varying phase difference and closes completely at π phase difference. The minigap at the center of the trijunction is protected to close over extended regions in phase space. These results agree with the theory by Fu and Kane [Phys. Rev. Lett. 100, 096407 (2008)].
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Bi2Te3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| Pb Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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