Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8164256 | Physica C: Superconductivity and its Applications | 2017 | 17 Pages |
Abstract
We investigate the hydrostatic pressure dependence of interfacial superconductivity occurring at the atomically sharp interface between two non-superconducting materials: the topological insulator (TI) Bi2Te3 and the parent compound Fe1+yTe of the chalcogenide iron-based superconductors. Under pressure, a significant increase in the superconducting transition temperature Tc is observed. We interpret our data in the context of a pressure-induced enhanced coupling of the Fe1+yTe interfacial layer with the Bi2Te3 surface state, which modifies the electronic properties of the interface layer in a way that superconductivity emerges and becomes further enhanced under pressure. This demonstrates the important role of the TI in the interfacial superconducting mechanism.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Condensed Matter Physics
Authors
Junying Shen, Claire Heuckeroth, Yuhang Deng, Qinglin He, Liu Hong Chao, Liang Jing, Wang Jiannong, Iam Keong Sou, James S. Schilling, Rolf Lortz,