We consider the half-filled Hubbard model with a cut-off forbidding momenta close to the angles of the square shaped Fermi surface. By renormalization group methods we find a convergent expansion for the Schwinger function up to exponentially small temperatures. We prove that the system is not a Fermi liquid, but on the contrary it behaves like a Marginal Fermi liquid, a behaviour observed in the normal phase of high Tc superconductors.

Mastropietro, V. (2002). Marginal fermi liquid behaviour in the d = 2 Hubbard model with cut-off. ANNALES HENRI POINCARE', 3(6), 1183-1213 [10.1007/s000230200002].

Marginal fermi liquid behaviour in the d = 2 Hubbard model with cut-off

MASTROPIETRO, VIERI
2002

Abstract

We consider the half-filled Hubbard model with a cut-off forbidding momenta close to the angles of the square shaped Fermi surface. By renormalization group methods we find a convergent expansion for the Schwinger function up to exponentially small temperatures. We prove that the system is not a Fermi liquid, but on the contrary it behaves like a Marginal Fermi liquid, a behaviour observed in the normal phase of high Tc superconductors.
Pubblicato
Rilevanza internazionale
Articolo
Sì, ma tipo non specificato
Settore MAT/07 - Fisica Matematica
English
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http://www.springerlink.com/content/hqp4dpb6nug26x3n/
Mastropietro, V. (2002). Marginal fermi liquid behaviour in the d = 2 Hubbard model with cut-off. ANNALES HENRI POINCARE', 3(6), 1183-1213 [10.1007/s000230200002].
Mastropietro, V
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/2108/43741
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