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arxiv: 0806.1301 · v3 · submitted 2008-06-07 · ❄️ cond-mat.supr-con · cond-mat.str-el

Superconductivity up to 37 K in (A1-xSrx)Fe2As2 with A=K and Cs

classification ❄️ cond-mat.supr-con cond-mat.str-el
keywords superconductivitysystemfe-baseda-layersa1-xsrxafe2as2avenuesbeen
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A new hight Tc Fe-based compound system, AFe2As2 with A = K, Cs, K/Sr and Cs/Sr has been found. Through electron-doping, Tc of the A = K and Cs compounds rises to ~37 K, and finally enter a spin-density-wave state (SDW) through further electron doping with Sr. The observation demonstrates the crucial role of the (FeAs)-layers in the superconductivity in the Fe-based layered system and the special feature of elemental A-layers in this complex chemical system may provide new avenues to superconductivity at a higher Tc.

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