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Single hole motion in LaMnO$_3$

Wei-Guo Yin·Hai-Qing Lin·Chang-De Gong
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Abstract

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.

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Wei-Guo Yin, Hai-Qing Lin, Chang-De Gong. 2001-03-07. Single hole motion in LaMnO$_3$. https://doi.org/10.1103/physrevlett.87.047204

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