期刊
PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS
卷 247, 期 3, 页码 500-505出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/pssb.200983074
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An overview of the recent development of the superconducting FeSe(1-x) and related compounds is presented. Methods to synthesize high purity poly-crystalline samples, single crystals, and thin films with preferred orientation are described. It was found that the effects of chemical doping to the Se-site or Fe-site are rather different. ionic size of the doping is found to play critical role on the occurrence of superconductivity. We also review the physical properties, including transport, magnetic, and thermal properties. There exist interesting transport anomalies in the resistivity and Hall coefficient at low temperature; and it was found that a structural distortion at low temperature is critical to the occurrence of superconductivity in these materials. However, the exact origin of these observed anomalies are not clear, and the exact pairing symmetry in FeSe-based superconductors is also still in question. (C) 2010 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
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