Superconductivity at 31 K in the "111"-type iron arsenide superconductor Na[subscript 1−x] FeAs induced by pressure
The effect of pressure on the superconductivity of '111'-type Na{sub 1-x}FeAs is investigated through temperature-dependent electrical-resistance measurements in a diamond anvil cell. The superconducting transition temperature (T{sub c}) increases from 26 K to a maximum of 31 K as the pressure increases from ambient pressure to 3 GPa. Further increasing pressure suppresses T{sub c} drastically. The behavior of pressure-tuned T{sub c} in Na{sub 1-x}FeAs is much different from that in Li{sub x}FeAs, although they have the same Cu{sub 2}Sb-type structure.
- Research Organization:
- Argonne National Laboratory (ANL)
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 1006114
- Journal Information:
- EPL Journal, Journal Name: EPL Journal Journal Issue: (4) ; 12, 2009 Vol. 88; ISSN 0295-5075
- Country of Publication:
- United States
- Language:
- ENGLISH
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