Hole spectral functions of LaMnO3

We analyze the possible outcome of the angle-resolved photoemission spectro scopy for LaMnO3 within the self-consistent Born approximation. The quasipa rticle bandwidth scales, respectively, with J (the orbital superexchange en ergy) and t (the hole transfer integral) in the absence and presence of str ong electron-phonon interaction, and the quasiparticles are orbital polaron s and Holstein polarons respectively. (C) 2001 Elsevier Science B.V. All ri ghts reserved.