中国物理学会期刊网
Chin. Phys. Lett.  2008, Vol.25 Issue (9): 3403-3405  
Superconductivity in Hole-Doped (Sr1-xKx)Fe2As2
Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190

Abstract

A series of layered (Sr1-xKx)Fe2As2 compounds with nominal x=0--0.40 are synthesized by solid state reaction method. Similar to other parent compounds of iron-based pnictide superconductors, pure SrFe2As2 shows a strong resistivity anomaly near 210 K, which was ascribed to the spin-density-wave instability. The anomaly temperature is much higher than those observed in LaOFeAs and BaFe2As2, the two prototype parent compounds with ZrCuSiAs- and ThCr2Si2-type structures. K-doping strongly suppresses this anomaly and induces superconductivity. Like in the case of K-doped BaFe2As2, sharp superconducting transitions at Tc38K is observed. We perform the Hall coefficient measurement, and confirm that the dominant carriers are hole-type. The carrier density is enhanced by a factor of 3 in comparison to F-doped LaOFeAs superconductor.
收稿日期:2008-06-13

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[英文]
CHEN Gen-Fu, LI Zheng, LI Gang, HU Wan-Zheng, DONG Jing, ZHOU Jun, ZHANG Xiao-Dong, ZHENG Ping, WANG Nan-Lin, LUO Jian-Lin. Superconductivity in Hole-Doped (Sr1-xKx)Fe2As2[J]. CPL, 2008, 25(9): 3403-3405.
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