https://doi.org/10.1140/epjb/e2002-00200-4
Landau-Fermi liquid analysis of the 2D t-t' Hubbard model
Theoretische Physik,
ETH-Hönggerberg, 8093 Zürich, Switzerland
Corresponding author: a pfrigeri@itp.phys.ethz.ch
Received:
18
March
2002
Published online:
9
July
2002
We calculate the Landau interaction function
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.
PACS: 71.10.Fd – Lattice fermion models (Hubbard model, etc.) / 74.72.Jt – Other cuprates
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2002
