Asymmetric electron-phonon interactions in the three-band Peierls-Hubbard model

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dc.creatorHuang, Z. B.
dc.creatorHanke, W.
dc.creatorArrigoni, E.
dc.date2003-09-16
dc.date.accessioned2026-07-07T02:53:28Z
dc.date.available2026-07-07T02:53:28Z
dc.descriptionUsing the Quantum Monte Carlo (QMC) technique within frozen-phonon, we studied the effects of the half-breathing O$(π,0)$ phonon mode on the ground-state properties of the three-band Peierls-Hubbard model. Our simulations are performed for both ionic and covalent electron-phonon couplings. The effects of lattice displacements on the ground-state energies and charge fluctuations are similar in magnitude for both hole- and electron-doped cases. However, the effects of lattice displacements on the magnetic properties are rather different. In the hole-doped case, the normalized next-nearest-neighbor Cu-Cu spin correlations are dramatically modified by both ionic and covalent electron-phonon couplings. On the other hand, in the electron-doped case, much smaller effects are observed. The distinct spin-phonon couplings, in conjunction with the spin-bag picture of the quasiparticle, could explain a strong mass renormalization effect in the p-type cuprates and a weaker effect in the n-type cuprates.
dc.description5 pages, 5 figures
dc.identifierhttps://arxiv.org/abs/cond-mat/0309380
dc.identifierhttp://arxiv.org/abs/cond-mat/0309380
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/22230
dc.subjectStrongly Correlated Electrons
dc.titleAsymmetric electron-phonon interactions in the three-band Peierls-Hubbard model
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