Landau-Fermi liquid analysis of the 2D t-t' Hubbard model |
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Authors: | PA Frigeri C Honerkamp TM Rice |
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Institution: | Theoretische Physik, ETH-H?nggerberg, 8093 Zürich, Switzerland, CH
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Abstract: | We calculate the Landau interaction function f (k,k') for the two-dimensional t-t' Hubbard model on the square lattice using second and higher order perturbation theory. Within the Landau-Fermi liquid framework
we discuss the behavior of spin and charge susceptibilities as function of the onsite interaction and band filling. In particular
we analyze the role of elastic umklapp processes as driving force for the anisotropic reduction of the compressibility on
parts of the Fermi surface.
Received 18 March 2002 Published online 9 July 2002 |
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