Issue |
Europhys. Lett.
Volume 34, Number 5, May II 1996
|
|
---|---|---|
Page(s) | 367 - 372 | |
Section | Condensed matter: electronic structure, electrical, magnetic and optical properties | |
DOI | https://doi.org/10.1209/epl/i1996-00466-6 | |
Published online | 01 September 2002 |
Multimode electron-phonon coupling in the two-dimensional t-J–Holstein model
1
Laboratoire de Physique Quantique, Université Paul Sabatier,
31062 Toulouse, France
2
Department of Physics, University of California Santa Barbara, CA 93106, USA
3
Institute for Physics, University of Wurzburg, D-8700 Wurzburg, Germany
Received:
12
February
1996
Accepted:
21
March
1996
Polaronic effects are investigated in the two-dimensional 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-localization
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.
PACS: 71.27.+a – Strongly correlated electron systems / 71.38.+i – Polarons and electron-phonon interactions / 74.20.Mn – Microscopic theory of high- superconductivity;
insulator-superconductor transitions
© EDP Sciences, 1996
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