Incommensurate spin fluctuations in the two-dimensional t-t'-U model

Details Incommensurate spin fluctuations in the two-dimensional t-t'-U model Incommensurate spin fluctuations in the two-dimensional t-t'-U model

1997-07-25

arxiv.org/abs/cond-mat/9707266v1

Phys. Lett. A 240, 235 (1998)

Physics

Condensed Matter

Superconductivity

3 pages, 6 Postscript figures, RevTeX, submitted to Phys. Lett. A

Scientific paper

10.1016/S0375-9601(98)00030-9

Magnetic properties of the two-dimensional t-t'-U model are investigated by studying the static spin magnetic susceptibility as a function of momentum for various temperatures. The calculations are performed by means of the Composite Operator Method in the static approximation. By increasing the value of the t' parameter the magnetic scattering in the reciprocal space evolves to an isotropic structure. It is shown that the results are in qualitative agreement with the experimental situation observed in LSCO and YBCO compounds.

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