Physics – Condensed Matter – Superconductivity
Scientific paper
2011-12-30
Front. Phys., 2011, 6( 4) : 410-428
Physics
Condensed Matter
Superconductivity
45 pages, 19 figures
Scientific paper
10.1007/s11467-011-0229-5
The latest discovery of a new iron-chalcogenide superconductor A$_x$Fe$_{2-y}$Se$_2$(A=K, Cs, Rb, Tl and etc.) has attracted much attention due to a number of its unique characteristics, such as the possible insulating state of the parent compound, the existence of Fe-vacancy and its ordering, a new form of magnetic structure and its interplay with superconductivity, and the peculiar electronic structures that are distinct from other Fe-based superconductors. In this paper, we present a brief review on the structural, magnetic and electronic properties of this new superconductor, with an emphasis on the electronic structure and superconducting gap. Issues and future perspectives are discussed at the end of the paper.
Mou Daixiang
Zhao Lin
Zhou Xingjiang
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