Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/67080
Type: Artigo de periódico
Title: Forward scattering approximation and bosonization in integer quantum Hall systems
Author: da Costa, MR
Westfahl, H
Caldeira, AO
Abstract: In this work, we present a model and a method to study integer quantum Hall (IQH) systems. Making use of the Landau levels structure we divide these two-dimensional systems into a set of interacting one-dimensional gases, one for each guiding center. We show that the so-called strong field approximation, used by Kallin and Halperin and by MacDonald, is equivalent, in first order, to a forward scattering approximation and analyze the IQH systems within this approximation. Using an appropriate variation of the Landau level bosonization method we obtain the dispersion relations for the collective excitations and the single-particle spectral functions. For the bulk states, these results evidence a behavior typical of non-normal strongly correlated systems, including the spin-charge splitting of the single-particle spectral function. We discuss the origin of this behavior in the light of the Tomonaga-Luttinger model and the bosonization of two-dimensional electron gases. (C) 2007 Elsevier Inc. All rights reserved.
Subject: bosonization
quantum Hall effect
forward scattering approximation
spectral function
Country: EUA
Editor: Academic Press Inc Elsevier Science
Rights: fechado
Identifier DOI: 10.1016/j.aop.2007.04.018
Date Issue: 2008
Appears in Collections:Unicamp - Artigos e Outros Documentos

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