LiFeAs: An Intrinsic FeAs-based Superconductor with Tc = 18K

Autor:	Tapp, Joshua H., Tang, Zhongjia, Lv, Bing, Sasmal, Kalyan, Lorenz, Bernd, Chu, Paul C. W., Guloy, Arnold M.
Rok vydání:	2008
Předmět:	Condensed Matter - Superconductivity Condensed Matter - Strongly Correlated Electrons
Zdroj:	Phys. Rev. B 78, 060505(R) (2008)
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevB.78.060505
Popis:	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) A and c=6.364(2) A. 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=18 K with electronlike carriers and a very high critical field, Hc2(0)>80 T. LiFeAs appears to be the chemical equivalent of the infinite layered compound of the high-Tc cuprates. Comment: 4 pages, 5 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/0807.2274 Zobrazit plný text záznamu View this record from Arxiv