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, Y. Ding, H. K. Mao, C. Q. Jin
TL;DR
This study investigates how applying pressure affects the superconducting transition temperature of NaxFeAs, revealing a maximum Tc of 31 K at 3 GPa, with suppression at higher pressures, highlighting differences from similar compounds.
Contribution
It provides new insights into pressure-induced superconductivity enhancement in NaxFeAs, contrasting its behavior with LixFeAs despite structural similarities.
Findings
Tc increases from 26 K to 31 K under pressure
Maximum Tc occurs at 3 GPa
Pressure suppresses Tc beyond 3 GPa
Abstract
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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