Non-generality of the Kadowaki-Woods ratio in correlated oxides

Details Non-generality of the Kadowaki-Woods ratio in correlated oxides Non-generality of the Kadowaki-Woods ratio in correlated oxides

2004-09-10

arxiv.org/abs/cond-mat/0409252v1

J. Phys. Soc. Japan, vol. 74, 1107-1110 (2005)

Physics

Condensed Matter

Strongly Correlated Electrons

9 pages of text, 1 table, 2 figures

Scientific paper

10.1143/JPSJ.74.1107

An explicit expression for the Kadowaki-Woods ratio in correlated metals is derived by invoking saturation of the (high-frequency) Fermi-liquid scattering rate at the Mott-Ioffe-Regel limit. Significant deviations observed in a number of oxides are quantitatively explained due to variations in carrier density, dimensionality, unit cell volume and the number of individual sheets in the Brillouin zone. A generic re-scaling of the original Kadowaki-Woods plot is also presented.

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