Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2001-03-07
Phys. Rev. Lett. 87, 047204 (2001)
Physics
Condensed Matter
Strongly Correlated Electrons
4 pages, 4 eps figures
Scientific paper
10.1103/PhysRevLett.87.047204
We study single hole motion in LaMnO$_3$ using the classical approximation for JT 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 LaMnO$_3$, quantum effects of electron-phonon interaction are small. The quasiparticle bandwidth $W \simeq 2.2J$ 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.
Gong Chang-De
Lin Hai-Qing
Yin Wei-Guo
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