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

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 where 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.

5 pages, 2 figures

References in corpus (8)

• Phase diagram of the one-dimensional half-filled extended Hubbard model
• Polaronic behavior of undoped high-Tc cuprates
• Electron-phonon interaction in the t-J model
• Interplay between electron-phonon and Coulomb interactions in cuprates
• Quantum lattice dynamical effects on the single-particle excitations in 1D Mott and Peierls insulators
• Temperature dependence of the angle resolved photoemission spectra in the undoped cuprates: self-consistent approach to the t-J-Holstein model
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Cited by in corpus (5)

• Coupling-dependent rates of energy transfers from photoexcited Mott insulators to lattice vibrations
• Density-matrix renormalization group methods for momentum- and frequency-resolved dynamical correlation functions
• Density matrix renormalization group study of optical conductivity in the one-dimensional Mott insulator Sr_2CuO_3
• Bound Excitons in Sr${}_2$CuO${}_3$
• Optical excitations in Sr${}_2$CuO${}_3$