منابع مشابه
Non-Fermi Liquid Fixed Point in 2+1 Dimensions
We construct models of excitations about a Fermi surface that display calculable deviations from Fermi liquid behavior in the low-energy limit. They arise as a consequence of coupling to a Chern-Simons gauge field, whose fluctations are controlled through a 1 kx interaction. The Fermi liquid fixed point is shown to be unstable in the infrared for x < 1, and an infrared-stable fixed point is fou...
متن کاملHolographic non-Fermi-liquid fixed points.
Techniques arising from string theory can be used to study assemblies of strongly interacting fermions. Via this 'holographic duality', various strongly coupled many-body systems are solved using an auxiliary theory of gravity. Simple holographic realizations of finite density exhibit single-particle spectral functions with sharp Fermi surfaces, of a form distinct from those of the Landau theor...
متن کاملThe Fermi Liquid as a Renormalization Group Fixed Point
par Guennadi Chitov Thèse présentée au département de Physique en vue de l'obtention du grade de Docteurès sciences (Ph. SUMMARY The renormalization-group (RG) method is applied to study interacting fermions at finite temperature. A model based on the ψ 4-Grassmann effective action with SU(N)-invariant short-range interaction and a rotationally invariant Fermi surface in spatial dimensions d = ...
متن کاملThe disordered Fermi - liquid fixed point and its insta - bilities
Abstract. The concept of a disordered Fermi-liquid fixed point is introduced and used to understand various properties of disordered metals within a unifying framework. Corrections to scaling near this fixed point give what are commonly called weak-localization effects. Various instabilities of the disordered Fermi-liquid phase are discussed. These include two distinct types of superconducting-...
متن کاملLuttinger liquid fixed point for a 2D flat Fermi surface
We consider a system of 2D interacting fermions with a flat Fermi surface. The apparent conflict between Luttinger and non Luttinger liquid behavior found through different approximations is resolved by showing the existence of a line of non trivial fixed points, for the RG flow, corresponding to Luttinger liquid behavior; the presence of marginally relevant operators can cause flow away from t...
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ژورنال
عنوان ژورنال: Physical Review B
سال: 1997
ISSN: 0163-1829,1095-3795
DOI: 10.1103/physrevb.55.12460