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arxiv: 1012.2924 · v1 · pith:TPUBANZLnew · submitted 2010-12-14 · ❄️ cond-mat.supr-con

Superconductivity in the iron selenide KxFe2Se2 (0 <= x <= 1)

Jiangang Guo , Shifeng Jin , Gang Wang , Shunchong Wang , Kaixing Zhu , Tingting Zhou , Meng He , Xiaolong Chen This is my paper
classification ❄️ cond-mat.supr-con
keywords fese-layersuperconductivityabovematerialsachievedambientbafe2as2carrier
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We report the superconductivity at above 30 K in a new 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 Tc 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 new FeSe-based 122 phase. Our results demonstrate that FeSe-layer materials are really remarkable superconductors via structure and carrier modulation.

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