Non-Fermi liquid behavior from two-dimensional antiferromagnetic fluctuations: a renormalization-group and large-N analysis
نویسندگان
چکیده
Sergey Pankov, Serge Florens, Antoine Georges, Gabriel Kotliar, and Subir Sachdev Center for Materials Theory, Department of Physics and Astronomy, Rutgers University, Piscataway, New Jersey 08854, USA Laboratoire de Physique Théorique, Ecole Normale Supérieure, 24 Rue Lhomond, 75231 Paris Cedex 05, France Department of Physics, Yale University, P.O. Box 208120, New Haven CT 06520-8120, USA (Dated: April 17, 2003)
منابع مشابه
Non-Fermi Behavior of the Strongly Correlated Electron Systems
(1) The temperature dependence of the specific heat for a marginal Fermi liquid has been calculated . We showed that the expected T lnT correction is characteristic for the low temperature domain. The high temperature domain has a supplementary correction. The results are in agreement with the non-Fermi behavior of some metallic systems in the low temperature domain. (2) We calculated the self-...
متن کاملPressure-induced non-Fermi-liquid behavior in a heavy-fermion compound Ce7Ni3 around the antiferromagnetic instability
Under increasing pressure, the Néel temperature of the heavy-fermion compound Ce7Ni3 ~TN51.9 K for P50! decreases and vanishes near Pc'0.33 GPa. Non-Fermi-liquid behavior appears at 0.4 GPa in both the specific heat and ac magnetic susceptibilitiy, Cm /T;2lnT and xac}(12aT ). Above 0.62 GPa, the normal Fermi-liquid state recovers, as indicated by the T independence of CmT and the T 2 dependence...
متن کاملFlow to strong coupling in the two-dimensional Hubbard model
We extend the analysis of the renormalization group flow in the two-dimensional Hubbard model close to half-filling using the recently developed temperature flow formalism. We investigate the interplay of d-density wave and Fermi surface deformation tendencies with those towards d-wave pairing and antiferromagnetism. For a ratio of next nearest to nearest neighbor hoppings, t′/t = −0.25, and ba...
متن کاملNon-Fermi-Liquid Behavior and Anomalous Suppression of Landau Damping in Layered Metals Close to Ferromagnetism.
We analyze the low-energy physics of nearly ferromagnetic metals in two spatial dimensions using the functional renormalization group technique. We find a new low-energy fixed point, at which the fermionic (electronlike) excitations are non-Fermi-liquid (z_{f}=13/10) and the magnetic fluctuations exhibit an anomalous Landau damping whose rate vanishes as Γ_{q}∼|q|^{3/5} in the low-|q| limit. We...
متن کاملA pr 1 99 3 Impurity systems fluctuating between two magnetic configurations : candidates for non Fermi - liquid behavior
The appropriate generalization of the isotropic impurity Anderson model for va-lence fluctuations between two magnetic multiplets l n and l n+1 is solved in the strong-coupling limit of Wilson's renormalization group for l ≤ 3. Except in the extreme case of j − j coupling, the ground state is degenerate, the impurity magnetic moment is very small and is overscreened by the conduction electrons....
متن کامل