title: Single hole motion in LaMnO3.
abstract: We study single hole motion in LaMnO3 using the classical approximation for Jahn-Teller lattice distortions, a modified Lang-Firsov approximation for dynamical breathing-mode phonons, and the self-consistent Born approximation (verified by exact diagonalization) for hole-orbital-excitation scattering. We show that in the realistic parameter space for LaMnO3, quantum effects of electron-phonon interaction are small. The quasiparticle bandwidth is about 2.2J in the purely orbital t-J model. It is strikingly broadened to be of order t by strong static Jahn-Teller lattice distortions even when the polaronic band narrowing is taken into account.
authors.affiliation: Department of Physics, The Chinese University of Hong Kong, Sha Tin, Hong Kong, People's Republic of China. wgyin@yahoo.com
authors.forename: W G
authors.initials: WG
authors.lastname: Yin
authors.forename: H Q
authors.initials: HQ
authors.lastname: Lin
authors.forename: C D
authors.initials: CD
authors.lastname: Gong