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

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

2009-12-10

arxiv.org/abs/0912.2025v1

epl 88, 47008(2009)

Physics

Condensed Matter

Superconductivity

Scientific paper

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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