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Marginal-Fermi-liquid behavior from two-dimensional Coulomb interaction

J. González, F. Guinea, and M. A. H. Vozmediano
Phys. Rev. B 59, R2474(R) – Published 15 January 1999
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Abstract

A full, nonperturbative renormalization group analysis of interacting electrons in a graphite layer is performed, in order to investigate the deviations from Fermi-liquid theory that have been observed in the experimental measures of a linear quasiparticle decay rate in graphite. The electrons are coupled through Coulomb interactions, which remain unscreened due to the semimetallic character of the layer. We show that the model flows towards the noninteracting fixed point for the whole range of couplings, with logarithmic corrections which signal the marginal character of the interaction separating Fermi-liquid and non-Fermi-liquid regimes.

  • Received 29 June 1998

DOI:https://doi.org/10.1103/PhysRevB.59.R2474

©1999 American Physical Society

Authors & Affiliations

J. González

  • Instituto de Estructura de la Materia, Consejo Superior de Investigaciones Científicas, Serrano 123, 28006 Madrid, Spain

F. Guinea

  • Instituto de Ciencia de Materiales, Consejo Superior de Investigaciones Científicas, Cantoblanco, 28049 Madrid, Spain

M. A. H. Vozmediano

  • Escuela Politécnica Superior, Universidad Carlos III, Butarque 15 Leganés, 28913 Madrid, Spain

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Vol. 59, Iss. 4 — 15 January 1999

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