LiFeAs: An intrinsic FeAs-based superconductor withTc=18 K

2008/07/31 by Joshua Tapp, Joshua H. Tapp, Zhongjia Tang +6 · 10 citations
Chemistry · Materials Science · Physics and Astronomy · #Chemistry #Condensed matter physics #Crystal structure #Crystallography #Cuprate #Doping #Geology #Inorganic Chemistry and Materials #Iron-based superconductors research #Materials science #Physical chemistry #Physics #Rare-earth and actinide compounds #Stoichiometry #Superconductivity #Tetragonal crystal system #Type (biology) #cond-mat.str-el #cond-mat.supr-con

paper · pdf · doi:10.1103/physrevb.78.060505

published as Phys. Rev. B 78, 060505(R) (2008) · 4 pages, 5 figures

openalex publication_date 2008/08/18 · arxiv created 2008/08/25 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

The synthesis and properties of LiFeAs, a high-T_c 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) \text\AA and c=6.364(2) \text\AA. 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 T_c=18 K with electronlike carriers and a very high critical field, H_c2(0)>80 T. LiFeAs appears to be the chemical equivalent of the infinite layered compound of the high-T_c cuprates.

Citations

• Two-band superconductivity in LaFeAsO0.89F0.11 at very high magnetic fields

Cited by

• Crystal structure of the new FeSe1−x superconductor
• Microwave surface-impedance measurements of the electronic state and dissipation of magnetic vortices in superconducting LiFeAs single crystals
• Evolution of correlation strength in KxFe2–ySe2superconductor doped with S
• Andreev bound states in iron pnictide superconductors
• Superconductivity in titanium-based pnictide oxide compounds
• Molecular beam epitaxy growth of superconducting LiFeAs film on SrTiO 3 (001) substrate
• Large Transport Critical Current Densities of Ag Sheathed (Ba,K)Fe2As2+Ag Superconducting Wires Fabricated by anEx-situPowder-in-Tube Process
• Weak Superconducting Pairing and a Single Isotropic Energy Gap in Stoichiometric LiFeAs
• Identifying valence structure in LiFeAs and NaFeAs with core-level spectroscopy
• A new “111” type iron pnictide superconductor LiFeP
• Electronic properties of novel 6 K superconductor LiFeP in comparison with LiFeAs from first principles calculations

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• The superconductivity at 18 K in LiFeAs system
• Synthesis, anisotropy, and superconducting properties of LiFeAs single crystal
• A new “111” type iron pnictide superconductor LiFeP
• Possible superconductivity in Fe-Sb based materials: Density functional study of LiFeSb
• Evidence for +-s-wave pairing symmetry in LiFeAs: specific heat study