Electron-phonon interaction in the three-band model

Details Electron-phonon interaction in the three-band model Electron-phonon interaction in the three-band model

2004-07-20

arxiv.org/abs/cond-mat/0407507v1

Phys. Rev. B 70, 224518 (2004)

Physics

Condensed Matter

Strongly Correlated Electrons

7 pages, RevTeX, 4 eps figures

Scientific paper

10.1103/PhysRevB.70.224518

We study the half-breathing phonon in the three-band model of a high temperature superconductor, allowing for vibrations of atoms and resulting changes of hopping parameters. Two different approaches are compared. From the three-band model a t-J model with phonons can be derived, and phonon properties can be calculated. To make contact to density functional calculations, we also study the three-band model in the Hartree-Fock (HF) approximation. The paramagnetic HF solution, appropriate for the doped cuprates, has similarities to the local-density approximation (LDA). However, in contrast to the LDA, the existence of an antiferromagnetic insulating solution for the undoped system makes it possible to study the softening of the half-breathing phonon under doping. We find that although the HF approximation and the t-J model give similar softenings, these softenings happen in quite different ways. We also find that the HF approximation gives an incorrect doping and q dependence for the softening and too small a width for the (half-)breathing phonon.

Affiliated with

Also associated with

No associations

Rating

Electron-phonon interaction in the three-band 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 Electron-phonon interaction in the three-band model, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electron-phonon interaction in the three-band model will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-142935