Electron-phonon interaction in the t-J model.
Electron-phonon interaction in the t-J model.
复制标题
t-J 模型中的电子-声子相互作用。
DOI:
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发表时间:
2003
影响因子:
8.6
通讯作者:
O. Gunnarsson
中科院分区:
文献类型:
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作者:
O. Rösch;O. Gunnarsson
We derive a t-J model with electron-phonon coupling from the three-band model, considering modulation of both hopping and Coulomb integrals by phonons. While the modulation of the hopping integrals dominates, the modulation of the Coulomb integrals cannot be neglected. The model explains the experimentally observed anomalous softening of the half-breathing mode upon doping and a weaker softening of the breathing mode. It is shown that other phonons are not strongly influenced, and, in particular, the coupling to a buckling mode is not strong in this model.