Electrical Conductivity of Fermi Liquids. II. Quasiparticle Transport

Details Electrical Conductivity of Fermi Liquids. II. Quasiparticle Transport Electrical Conductivity of Fermi Liquids. II. Quasiparticle Transport

1998-07-25

arxiv.org/abs/cond-mat/9807340v2

Physics

Condensed Matter

28 pages, 7 figures; J. Phys. Soc. Jpn. Vol.67, No.10

Scientific paper

10.1143/JPSJ.67.4178

We develop a general theory of Fermi liquids to discuss the Kadowaki-Woods relation $A\propto \gamma^2$. We derive a formula for the ratio $A/\gamma^2$ which is expressed as a product of two dimensionless parameters $\alpha$ and $F$, where $\alpha$ represents a coupling constant for quasiparticle scattering and $F$ is a geometric factor determined by the shape of the Fermi surface. Then we argue that the universal ratio observed in heavy fermion compounds is reproduced under the conditions $\alpha\sim 1$ and $F\sim 20$. The former is regarded as a universality of Fermi liquids in a strong coupling regime, and the latter is corroborated by evaluating $F$ definitely in simple cases. It is noted that the proportional relation is just an example of the universal phenomena to be expected for the whole class of strong coupling Fermi liquids.

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