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Apparent violation of the Wiedemann-Franz law near a magnetic field tuned metal-antiferromagnetic quantum critical point.
MedLine Citation:
PMID:  19437656     Owner:  NLM     Status:  PubMed-not-MEDLINE    
Abstract/OtherAbstract:
The temperature dependences of the interlayer electrical and thermal resistivity in a layered metal are calculated for Fermi liquid quasiparticles which are scattered inelastically by two-dimensional antiferromagnetic spin fluctuations. Both resistivities have a linear temperature dependence over a broad temperature range. Extrapolations to zero temperature made from this linear-T range give values that appear to violate the Wiedemann-Franz law. However, below a low-temperature scale, which becomes small close to the critical point, a recovery of this law occurs. Our results describe recent measurements on CeCoIn5 near a magnetic field-induced quantum phase transition. Hence, the experiments do not necessarily imply a non-Fermi liquid ground state.
Authors:
M F Smith; Ross H McKenzie
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Physical review letters     Volume:  101     ISSN:  0031-9007     ISO Abbreviation:  Phys. Rev. Lett.     Publication Date:  2008 Dec 
Date Detail:
Created Date:  2009-05-13     Completed Date:  2009-05-27     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0401141     Medline TA:  Phys Rev Lett     Country:  United States    
Other Details:
Languages:  eng     Pagination:  266403     Citation Subset:  -    
Affiliation:
University of Queensland, Department of Physics, 4072 Brisbane, Queensland, Australia. mfsmith@physics.uq.edu.au
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