Effective interactions in the stripe state of the two-dimensional Hubbard model

Details Effective interactions in the stripe state of the two-dimensional Hubbard model Effective interactions in the stripe state of the two-dimensional Hubbard model

2001-02-21

arxiv.org/abs/cond-mat/0102374v2

Physics

Condensed Matter

Superconductivity

9 pages

Scientific paper

10.1103/PhysRevB.65.075109

We investigate the structure of the pairing potential in the stripe phase of the two-dimensional Hubbard model. Based on the random phase approximation we discuss in detail the interactions in the charge- and spin channel and compare our calculations with related considerations in commensurate antiferromagnets. Our main finding is that due to the incommensurate charge-density wave formation the exchange of collective modes in the charge channel is significantly enhanced with respect to the spin bag approach whereas due to the inhomogeneous charge distribution the coupling to transverse spin fluctuations tends to be suppressed.

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