Breakdown of the universality of the Kadowaki-Woods Ratio in multi-band metals

Cavanagh, D. C., Jacko, A. C. and Powell, B. J. (2015) Breakdown of the universality of the Kadowaki-Woods Ratio in multi-band metals. Physical Review B, 92 19: . doi:10.1103/PhysRevB.92.195138


 
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Author Cavanagh, D. C.
Jacko, A. C.
Powell, B. J.
Title Breakdown of the universality of the Kadowaki-Woods Ratio in multi-band metals
Journal name Physical Review B   Check publisher's open access policy
ISSN 1098-0121
1550-235X
Publication date 2015-11
Sub-type Article (original research)
DOI 10.1103/PhysRevB.92.195138
Open Access Status Not Open Access
Volume 92
Issue 19
Total pages 7
Place of publication College Park, MD, United States
Publisher American Physical Society
Collection year 2016
Language eng
Abstract We calculate the Kadowaki-Woods ratio (KWR) in Fermi liquids with arbitrary band structures. We find that, contrary to the single-band case, the ratio is not generally independent of the effects of electronic correlations (universal). This is very surprising given the experimental findings of a near universal KWR in many multiband strongly correlated metals. We identify a limit where the universality of the ratio is recovered. We discuss the KWR in Dirac semimetals and find that the KWR is independent of correlations, but strongly dependent on the doping of the system: for massless fermions, the KWR is proportional to the inverse square of the carrier density.
Keyword Heavy-fermion systems
Strongly correlated metals
Mean-field theory
Transport-properties
Electronic-structure
Electrical-conductivity
Transition-metals
Low-temperatures
Resistivity
Liquid
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Mathematics and Physics
Official 2016 Collection
 
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