Document Detail


Possibility of Valence-Fluctuatsion-Mediated Superconductivity in Cd-Doped CeIrIn_{5} Probed by In NQR.
MedLine Citation:
PMID:  23005666     Owner:  NLM     Status:  In-Data-Review    
Abstract/OtherAbstract:
We report on a pressure-induced evolution of exotic superconductivity and spin correlations in CeIr(In_{1-x}Cd_{x})_{5} by means of in-nuclear-quadrupole-resonance (NQR) studies. Measurements of an NQR spectrum and nuclear-spin-lattice-relaxation rate 1/T_{1} have revealed that antiferromagnetism induced by Cd doping emerges locally around Cd dopants, but superconductivity is suddenly induced at T_{c}=0.7 and 0.9 K at 2.34 and 2.75 GPa, respectively. The unique superconducting characteristics with a large fraction of the residual density of state at the Fermi level which increases with T_{c} differ from those for anisotropic superconductivity mediated by antiferromagnetic correlations. By incorporating the pressure dependence of the NQR frequency pointing to the valence change of Ce, we suggest that unconventional superconductivity in the CeIr(In_{1-x}Cd_{x})_{5} system may be mediated by valence fluctuations.
Authors:
M Yashima; N Tagami; S Taniguchi; T Unemori; K Uematsu; H Mukuda; Y Kitaoka; Y Ota; F Honda; R Settai; Y Onuki
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Publication Detail:
Type:  Journal Article     Date:  2012-09-14
Journal Detail:
Title:  Physical review letters     Volume:  109     ISSN:  1079-7114     ISO Abbreviation:  Phys. Rev. Lett.     Publication Date:  2012 Sep 
Date Detail:
Created Date:  2012-09-25     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0401141     Medline TA:  Phys Rev Lett     Country:  United States    
Other Details:
Languages:  eng     Pagination:  117001     Citation Subset:  IM    
Affiliation:
Department of Materials Engineering Science, Osaka University, Osaka 560-8531, Japan.
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