Magnetic properties of the 2D t-t′-Hubbard model
نویسندگان
چکیده
منابع مشابه
Landau-Fermi liquid analysis of the 2D t-t Hubbard model
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 drivi...
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We present a stability analysis of the 2D t-t′ Hubbard model on a square lattice for various values of the next-nearest-neighbor hopping t′ and electron concentration. Using the free energy expression, derived by means of the flow equations method, we have performed numerical calculation for the various representations under the point group C4ν in order to determine at which temperature symmetr...
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ژورنال
عنوان ژورنال: Physica C: Superconductivity
سال: 1997
ISSN: 0921-4534
DOI: 10.1016/s0921-4534(97)00967-2