Electrical Conductivity of Fermi Liquids. I. Many-body Effect on the Drude Weight

Details Electrical Conductivity of Fermi Liquids. I. Many-body Effect on the Drude Weight Electrical Conductivity of Fermi Liquids. I. Many-body Effect on the Drude Weight

1998-07-25

arxiv.org/abs/cond-mat/9807339v1

Physics

Condensed Matter

20 pages, 2 figures; J. Phys. Soc. Jpn. Vol.67, No.8

Scientific paper

10.1143/JPSJ.67.2792

On the basis of the Fermi liquid theory, we investigate the many-body effect on the Drude weight. In a lattice system, the Drude weight $D$ is modified by electron-electron interaction due to Umklapp processes, while it is not renormalized in a Galilean invariant system. This is explained by showing that the effective mass $m'$ for $D\propto n/m'$ is defined through the current, not velocity, of quasiparticle. It is shown that the inequality $D>0$ is required for the stability against the uniform shift of the Fermi surface. The result of perturbation theory applied for the Hubbard model indicates that $D$ as a function of the density $n$ is qualitatively modified around half filling $n\sim 1$ by Umklapp processes.

Affiliated with

Also associated with

No associations

Rating

Electrical Conductivity of Fermi Liquids. I. Many-body Effect on the Drude Weight does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Electrical Conductivity of Fermi Liquids. I. Many-body Effect on the Drude Weight, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electrical Conductivity of Fermi Liquids. I. Many-body Effect on the Drude Weight will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-130570