Two-dimensional Superconductivity from Dimerization of Atomically Ordered AuTe2Se4/3 Cubes
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https://figshare.com/articles/dataset/Two-dimensional_Superconductivity_from_Dimerization_of_Atomically_Ordered_AuTe2Se4_3_Cubes/5248489
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资源简介：
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
the 2D superconductivity in bulky AuTe<sub>2</sub>Se<sub>4/3, </sub>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 Å and 3.28 Å.
The superconductivity at 2.85 K is discovered, which is unraveled to be the quasi-2D
nature owing to the Berezinsky–Kosterlitz–Thouless topological transition. The
nesting of nearly parallel Fermi sheets could give rise to strong
electron-phonon coupling. It is proposed to further depleting the thickness
could result in more topologically-related phenomena.
提供机构：
figshare
创建时间：
2017-07-27
