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Superconductivity at 31 K in 111 type iron arsenide superconductor NaxFeAs induced by pressure

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arxiv 0912.2025 v1 pith:V2WGOUCH submitted 2009-12-10 cond-mat.supr-con cond-mat.othercond-mat.str-el

Superconductivity at 31 K in 111 type iron arsenide superconductor NaxFeAs induced by pressure

S. J. Zhang , X. C. Wang , Q. Q. Liu , Y.X. Lv , X. H. Yu , Z. J. Lin. , Y.S. Zhao , L. Wang
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Y. Ding H. K. Mao C. Q. Jin
This is my paper
classification cond-mat.supr-con cond-mat.othercond-mat.str-el
keywords pressurenaxfeastypeincreasessuperconductivitytemperaturealthoughambient
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The effect of pressure on superconductivity of 111 type NaxFeAs is investigated through temperature dependent electrical resistance measurement in a diamond anvil cell. The superconducting transition temperature (Tc) increases from 26 K to a maximum 31 K as the pressure increases from ambient to 3 GPa. Further increasing pressure suppresses Tc drastically. The behavior of pressure tuned Tc in NaxFeAs is much different from that in LixFeAs, although they have the same Cu2Sb type structure

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