Superconductivity at 31 K in the “111”-type iron arsenide superconductor Na_1-x FeAs induced by pressure

Journal Article · Sun Nov 01 23:00:00 EST 2009 · Europhysics Letters

DOI:https://doi.org/10.1209/0295-5075/88/47008· OSTI ID:1352208

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.

The effect of pressure on the superconductivity of “111”-type Na_1-xFeAs is investigated through temperature-dependent electrical-resistance measurements in a diamond anvil cell. The superconducting transition temperature (T_c) increases from 26K to a maximum of 31K as the pressure increases from ambient pressure to 3GPa. Further increasing pressure suppresses T_c drastically. The behavior of pressure-tuned Tc in Na_1-xFeAs is much different from that in Li_xFeAs, although they have the same Cu₂Sb-type structure.

• Research Organization: Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
• Sponsoring Organization: USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); USDOE National Nuclear Security Administration (NNSA); National Science Foundation (NSF); MOST of China
• DOE Contract Number: AC52-06NA25396
• OSTI ID: 1352208
• Journal Information: Europhysics Letters, Journal Name: Europhysics Letters Journal Issue: 4 Vol. 88; ISSN 0295-5075
• Publisher: IOP Publishing
• Country of Publication: United States
• Language: ENGLISH