Superconductivity at 31 K in the "111"-type iron arsenide superconductor Na1-x FeAs induced by pressure
Abstract
The effect of pressure on the superconductivity of "111"-type Na1-xFeAs is investigated through temperature-dependent electrical-resistance measurements in a diamond anvil cell. The superconducting transition temperature (Tc) increases from 26 K to a maximum of 31 K as the pressure increases from ambient pressure to 3 GPa. Further increasing pressure suppresses Tc drastically. The behavior of pressure-tuned Tc in Na1-x FeAs is much different from that in Lix FeAs, although they have the same Cu2Sb-type structure.
- Publication:
-
EPL (Europhysics Letters)
- Pub Date:
- November 2009
- DOI:
- arXiv:
- arXiv:0912.2025
- Bibcode:
- 2009EL.....8847008Z
- Keywords:
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- Condensed Matter - Superconductivity;
- Condensed Matter - Other Condensed Matter;
- Condensed Matter - Strongly Correlated Electrons
- E-Print:
- epl 88, 47008(2009)