Multimode electron-phonon interactions in the 2-dimensional t-J-Holstein model
D. Poilblanc, T. Sakai, D. J. Scalapino, W. Hanke
Abstract
Polaronic effects are investigated in the two dimensional t--J model (describing Cu spins and holes of the planes in high-Tc cuprates) in the presence of in-plane dynamic oxygen breathing modes. We focus on the effect of dynamic multi-phonon modes. Spin and charge structure factors are computed. We found evidence for self-localisation of the holes and increased short range antiferromagnetic spin-spin correlations between the remaining spins. This effect persists when all the in-plane oxygen vibration degrees of freedom are taken into account. This suggests that dynamic phonons could play a key role in stabilizing inhomogeneous stripe phases or domain wall structures.
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