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. © 1998 Elsevier Science B.V.
Incommensurate spin fluctuations in the two-dimensional t-t′-U model
AVELLA, Adolfo;MANCINI, Ferdinando;
1998-01-01
Abstract
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. © 1998 Elsevier Science B.V.File in questo prodotto:
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