Quasi-two-dimensional superconductivity from dimerization of atomically ordered AuTe₂Se_4/3 cubes.

ABSTRACT: The emergent phenomena such as superconductivity and topological phase transitions can be observed in strict two-dimensional (2D) crystalline matters. Artificial interfaces and one atomic thickness layers are typical 2D materials of this kind. Although having 2D characters, most bulky layered compounds, however, do not possess these striking properties. Here, we report quasi-2D superconductivity in bulky AuTe₂Se_4/3, where the reduction in dimensionality is achieved through inducing the elongated covalent Te-Te bonds. The atomic-resolution images reveal that the Au, Te, and Se are atomically ordered in a cube, among which are Te-Te bonds of 3.18 and 3.28 Å. The superconductivity at 2.85 K is discovered, which is unraveled to be the quasi-2D nature owing to the Berezins

SUBMITTER: Guo JG 

PROVIDER: S-EPMC5636790 | biostudies-literature | 2017 Oct

REPOSITORIES: biostudies-literature