Superconductivity in the iron selenide KxFe2Se2 (0 ≤x≤1.0)
Superconductivity in the iron selenide KxFe2Se2 (0 ≤x≤1.0)
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DOI：
10.1103/physrevb.82.180520
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发表时间：
2010-11-29
影响因子：
3.7
通讯作者：
Chen, Xiaolong
中科院分区：
文献类型：
--
作者：
Guo, Jiangang;Jin, Shifeng;Chen, Xiaolong
我们报告的超导电性在30 K以上的FeSe层化合物K0.8Fe2Se2（名义组成）实现的金属K插入之间的FeSe层。它是BaFe_2As_2的等结构，在常压下具有FeSe层材料中最高的Tc。霍尔效应表明，在这种超导体中，载流子主要是电子。我们确认，在30 K以上观察到的超导性是由于这种FeSe基122相。我们的研究结果表明，FeSe层材料是真正了不起的超导体通过结构和载流子调制。
We report the superconductivity at above 30 K in a FeSe-layer compound K0.8Fe2Se2 (nominal composition) achieved by metal K intercalating in between FeSe layers. It is isostructural to BaFe2As2 and possesses the highest T-c for FeSe-layer materials so far under ambient pressure. Hall effect indicates the carriers are dominated by electron in this superconductor. We confirm that the observed superconductivity at above 30 K is due to this FeSe-based 122 phase. Our results demonstrate that FeSe-layer materials are really remarkable superconductors via structure and carrier modulation.