Hole spectral functions of LaMnO3
arXiv:cond-mat/0011433 · doi:10.1016/S0921-4534(01)00727-4
Abstract
By use of the orbital t-J model, we calculate the photoemission spectra of LaMnO3 using the exact diagonalization technique, and interpret our numerics quite well in the orbital-polaron scenario where the scattering between holes and orbital excitations is treated within the self-consistent Born approximation. The quasiparticle bandwidth is found to be of the order of J and t in the purely Coulombic and Jahn-Teller phononic model, respectively. We suggest that angle-resolved photoemission spectroscopy experiments allow one to distinguish between the orbital-polaron scenario and the Jahn-Teller polaron scenario.
5 pages with 4 eps figures. RevTeX 3.1. Correct two typos