Enhancement of phonon effects in photoexcited states of one-dimensional Mott insulators

Hiroaki Matsueda, Akihiro Ando, Takami Tohyama, Sadamichi Maekawa

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)

Abstract

We examine how the electron correlation affects the electron-phonon (EP) interaction in the linear optical absorption spectrum of the one-dimensional (1D) extended Hubbard-Holstein model. A density matrix renormalization group (DMRG) calculation shows that the effect of the EP interaction on an exciton is enhanced by increasing the on-site Coulomb repulsion. This enhancement is in contrast to the effect of the EP interaction on the ground state, wherein the Peierls instability is suppressed by the on-site Coulomb repulsion. The DMRG data with the EP interaction fit with absorption experiments in 1D cuprates better than those for the extended Hubbard model.

Original languageEnglish
Article number193112
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume77
Issue number19
DOIs
Publication statusPublished - 2008 May 29
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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