Eur. Phys. J. B (2012) 85: 350
https://doi.org/10.1140/epjb/e2012-30690-0

Regular Article

Dynamical properties of photogenerated polarons in one-dimensional dimerized Mott Insulators

¹ Division of Materials Science, Faculty of Pure and Applied Sciences, University of Tsukuba, 305-8573 Tsukuba, Japan
² Center for Computational Sciences, University of Tsukuba, 305-8577 Tsukuba, Japan

^a e-mail: s1120364@u.tsukuba.ac.jp

Received: 20 July 2012
Published online: 18 October 2012

Abstract

We study physical properties of photogenerated electron-lattice coupled states, polarons, in one-dimensional (1D) Peierls-Hubbard model with classical lattice distortion by means of the density matrix renormalization group method. The numerical results show novel midgap peaks in optical response spectra of polarons for large on-site Coulomb interaction U. These midgap peaks originate from charge-transfer excitations within the dimer in polarons.