Dynamics of fermions coupling to a U(1) gauge field in the limit e(2)- infinity - art. no. 245109

摘要

In this paper we study the properties of a gas of fermions coupling to a U(1) gauge field at wave vectors qLambda>k(F) at dimensions larger than 1, where Lambdak(F) is a high-momentum cutoff and k(F) is the Fermi wave vector. In particular, we shall consider the e(2)-->infinity limit, where charge and current fluctuations at wave vectors qLambda> are forbidden. By generalizing a method reported in a previous paper [Phys. Rev. B 62, 7019 (2000)], we show that the system can be described as a "marginal" Fermi Liquid of spin 1/2; chargeless fermions with vanishing wave functions overlap with the bare fermions in the system. [References: 22]