Multimode electron-phonon interactions in the 2-dimensional t-J-Holstein model

Details Multimode electron-phonon interactions in the 2-dimensional t-J-Holstein model Multimode electron-phonon interactions in the 2-dimensional t-J-Holstein model

1995-11-27

arxiv.org/abs/cond-mat/9511125v2

Physics

Condensed Matter

Revised version, RevTex, 3 pages, 3 figures in uuencoded format appended

Scientific paper

Polaronic effects are investigated in the two dimensional t--J model (describing Cu spins and holes of the planes in high-$T_c$ 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 {\it 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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