Superconductivity at 31 K in 111 type iron arsenide superconductor NaxFeAs induced by pressure
Zhang, S. J. · Wang, X. C. · Liu, Q. Q. · Lv, Y. X. · Yu, X. H. · Lin., Z. J. · Zhao, Y. S. · Wang, L. · Ding, Y. · Mao, H. K. · Jin, C. Q.
Original · EN
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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