Non-Fermi Liquids in the Extended Hubbard Model

Abstract

I summarize recent work on non-Fermi liquids within certain generalized Anderson impurity model as well as in the large dimensionality ($D$) limit of the two-band extended Hubbard model. The competition between local charge and spin fluctuations leads either to a Fermi liquid with renormalized quasiparticle excitations, or to non-Fermi liquids with spin-charge separation. These results provide new insights into the phenomenological similarities and differences between different correlated metals. While presenting these results, I outline a general strategy of local approach to non-Fermi liquids in correlated electron systems.

30 pages, REVTEX, 14 figures included. To appear in ``Non Fermi Liquid Physics'', J. Phys: Cond. Matt. (1997)

References in corpus (7)

• One-Dimensional Fermi liquids
• Kosterlitz-Thouless Transition and Short Range Spatial Correlations in an Extended Hubbard Model
• A Comparison of the High-Frequency Magnetic Fluctuations in Insulating and Superconducting La2-xSrxCuO4
• Kondo disorder: a possible route towards non-Fermi liquid behavior
• Kondo effect in flux phases
• Two-Channel Kondo Lattice: An Incoherent Metal
• Universality class of non-Fermi liquid behavior in mixed valence systems

Cited by in corpus (3)

• Quantum phase transitions in heavy fermion metals and Kondo insulators
• Dynamics of disordered heavy Fermion systems
• Mixed-valence state in the dilute-impurity regime of La-substituted SmB${}_6$