LiFeAs: An intrinsic FeAs-based superconductor with Tc=18K
Abstract
The synthesis and properties of LiFeAs, a high- Tc Fe-based superconducting stoichiometric compound, are reported. Single crystal x-ray studies reveal that it crystallizes in the tetragonal PbFCl type (P4/nmm) with a=3.7914(7)Å and c=6.364(2)Å . Unlike the known isoelectronic undoped intrinsic FeAs compounds, LiFeAs does not show any spin-density wave behavior but exhibits superconductivity at ambient pressures without chemical doping. It exhibits a respectable transition temperature of Tc=18K with electronlike carriers and a very high critical field, Hc2(0)>80T . LiFeAs appears to be the chemical equivalent of the infinite layered compound of the high- Tc cuprates.
- Publication:
-
Physical Review B
- Pub Date:
- August 2008
- DOI:
- arXiv:
- arXiv:0807.2274
- Bibcode:
- 2008PhRvB..78f0505T
- Keywords:
-
- 74.70.Dd;
- 61.66.Fn;
- 74.25.Fy;
- Ternary quaternary and multinary compounds;
- Inorganic compounds;
- Transport properties;
- Condensed Matter - Superconductivity;
- Condensed Matter - Strongly Correlated Electrons
- E-Print:
- 4 pages, 5 figures