Protected gap closing in Josephson junctions constructed on Bi2Te3 surface
Zhaozheng Lyu, Yuan Pang, Junhua Wang, Guang Yang, Jie Fan, Guangtong Liu, Zhongqing Ji, Xiunian Jing, Changli Yang, Fanming Qu, Li Lu
DOI 10.1103/PhysRevB.98.155403 · Physical Review B
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Abstract
On the road of searching for Majorana zero modes (MZMs) in topological insulator-based Josephson junctions, a highly sought signature is the protected full transparency of electron transport through the junctions due to the existence of the MZMs, associated with complete gap closing between the electronlike and holelike Andreev bound states (ABSs). Here we present direct experimental evidence of gap closing and full transparency in single Josephson junctions constructed on the surface of three-dimensional topological insulator (3D TI) Bi2Te3. Our results demonstrate that the two-dimensional (2D) surface of 3D TIs provides a promising platform for hosting and manipulating MZMs.
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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