Charge fluctuations and electron-phonon interaction in the finite-$U$ Hubbard model

Details Charge fluctuations and electron-phonon interaction in the finite-$U$ Hubbard model Charge fluctuations and electron-phonon interaction in the finite-$U$ Hubbard model

2003-12-29

arxiv.org/abs/cond-mat/0312654v1

Phys. Rev. B 69, 161101 (2004)

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, eps figures included

Scientific paper

10.1103/PhysRevB.69.161101

In this paper we employ a gaussian expansion within the finite-$U$ slave-bosons formalism to investigate the momentum structure of the electron-phonon vertex function in the Hubbard model as function of $U$ and $n$. The suppression of large momentum scattering and the onset a small-${\bf q}$ peak structure, parametrized by a cut-off $q_c$, are shown to be essentially ruled by the band narrowing factor $Z_{\rm MF}$ due to the electronic correlation. A phase diagram of $Z_{\rm MF}$ and $q_c$ in the whole $U$-$n$ space is presented. Our results are in more than qualitative agreement with a recent numerical analysis and permit to understand some anomalous features of the Quantum Monte Carlo data.

Affiliated with

Also associated with

No associations

Rating

Charge fluctuations and electron-phonon interaction in the finite-$U$ Hubbard model 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 Charge fluctuations and electron-phonon interaction in the finite-$U$ Hubbard model, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Charge fluctuations and electron-phonon interaction in the finite-$U$ Hubbard model will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-717634