A unified explanation of the Kadowaki-Woods ratio in strongly correlated metals

Jacko, A. C., Fjaerestad, J. O. and Powell, B. J. (2009) A unified explanation of the Kadowaki-Woods ratio in strongly correlated metals. Nature Physics, 5 6: 422-425.


Author Jacko, A. C.
Fjaerestad, J. O.
Powell, B. J.
Title A unified explanation of the Kadowaki-Woods ratio in strongly correlated metals
Journal name Nature Physics   Check publisher's open access policy
ISSN 1745-2473
Publication date 2009-06
Year available 2009
Sub-type Article (original research)
DOI 10.1038/NPHYS1249
Volume 5
Issue 6
Start page 422
End page 425
Total pages 4
Editor Alison Wright
Place of publication United Kingdom
Publisher Nature Publishing Group
Collection year 2010
Language eng
Subject 970102 Expanding Knowledge in the Physical Sciences
0204 Condensed Matter Physics
C1
Abstract Discoveries of ratios whose values are constant within broad classes of materials have led to many deep physical insights. The Kadowaki–Woods ratio (KWR; refs 1, 2) compares the temperature dependence of a metal's resistivity to that of its heat capacity, thereby probing the relationship between the electron–electron scattering rate and the renormalization of the electron mass. However, the KWR takes very different values in different materials3,4. Here we introduce a ratio, closely related to the KWR, that includes the effects of carrier density and spatial dimensionality and takes the same (predicted) value in organic charge-transfer salts, transition-metal oxides, heavy fermions and transition metals—despite the numerator and denominator varying by ten orders of magnitude. Hence, in these materials, the same emergent physics is responsible for the mass enhancement and the quadratic temperature dependence of the resistivity, and no exotic explanations of their KWRs are required.
Keyword heavy-fermion system
Q-Index Code C1
Q-Index Status Confirmed Code

Document type: Journal Article
Sub-type: Article (original research)
Collections: Centre for Organic Photonics and Electronics
School of Mathematics and Physics
2010 Higher Education Research Data Collection
 
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