The anomaly Cu doping effects on LiFeAs superconductors

L. Y. Xing, H. Miao, X. C. Wang, J. Ma, Q. Q. Liu, Z. Deng, H. Ding, C. Q. Jin

Research output: Contribution to journalArticlepeer-review

22 Scopus citations

Abstract

The Cu substitution effect on the superconductivity of LiFeAs has been studied in comparison with Co/Ni substitution. It is found that the shrinking rate of the lattice parameter c for Cu substitution is much smaller than that of Co/Ni substitution. This is in conjugation with the observation of ARPES that shows almost the same electron and hole Fermi surfaces (FSs) size for undoped and Cu substituted LiFeAs sample, except for a very small hole band sinking below Fermi level with doping. This indicates that there is little doping effect at Fermi surface by Cu substitution, in sharp contrast to the more effective carrier doping effect by Ni or Co.

Original languageEnglish
Article number435703
JournalJournal of Physics Condensed Matter
Volume26
Issue number43
DOIs
StatePublished - Oct 29 2014
Externally publishedYes

Keywords

  • 1 1 1 type
  • anomaly doping effects
  • iron based superconductor

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