Document Detail

Heat-Capacity Measurements of Energy-Gap Nodes of the Heavy-Fermion Superconductor CeIrIn_{5} Deep inside the Pressure-Dependent Dome Structure of Its Superconducting Phase Diagram.
MedLine Citation:
PMID:  22324705     Owner:  NLM     Status:  In-Data-Review    
We use heat-capacity measurements as a function of field rotation to identify the nodal gap structure of CeIrIn_{5} at pressures to 2.05 GPa, deep inside its superconducting dome. A fourfold oscillation in the heat capacity at 0.3 K is observed for all pressures, but with its sign reversed between 1.50 and 0.90 GPa. On the basis of recent theoretical models for the field-angle-dependent specific heat, all data, including the sign reversal, imply a d_{x^{2}-y^{2}} order parameter with nodes along [110], which constrains theoretical models of the pairing mechanism in CeIrIn_{5}.
Xin Lu; Hanoh Lee; T Park; F Ronning; E D Bauer; J D Thompson
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Publication Detail:
Type:  Journal Article     Date:  2012-01-11
Journal Detail:
Title:  Physical review letters     Volume:  108     ISSN:  1079-7114     ISO Abbreviation:  Phys. Rev. Lett.     Publication Date:  2012 Jan 
Date Detail:
Created Date:  2012-02-13     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0401141     Medline TA:  Phys Rev Lett     Country:  United States    
Other Details:
Languages:  eng     Pagination:  027001     Citation Subset:  IM    
Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.
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