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Phys. Rev. B 73, 085105 (2006) [6 pages]

Quantum phase transition in the one-dimensional extended Peierls-Hubbard model

H. Benthien,1 F. H. L. Essler,2 and A. Grage1
1Fachbereich Physik, Philipps-Universität Marburg, D-35032 Marburg, Germany
2The Rudolf Peierls Centre for Theoretical Physics, University of Oxford, Oxford OX1 3NP, United Kingdom

Received 26 September 2005; published 10 February 2006

We consider the one-dimensional extended Hubbard model in the presence of an explicit dimerization delta. For a sufficiently strong nearest neighbor repulsion we establish the existence of a quantum phase transition between a mixed bond-order wave and charge-density wave phase from a pure bond-order wave phase. This phase transition is in the universality class of the two-dimensional Ising model.

©2006 The American Physical Society

URL: http://link.aps.org/doi/10.1103/PhysRevB.73.085105
DOI: 10.1103/PhysRevB.73.085105
PACS: 71.10.Fd; 71.10.Hf; 71.10.Pm; 71.20.Rv
  • 71.10.Fd
    Lattice fermion models (condensed matter) including Hubbard model, etc
  • 71.10.Hf
    Non-Fermi-liquid ground states, electron phase diagrams and phase transitions in model condensed matter systems
  • 71.10.Pm
    Fermions in reduced dimensions (condensed matter) including anyons, composite fermions, Luttinger liquid, etc
  • 71.20.Rv
    Electronic structure of polymers and organic compounds
  • YEAR: 2006
KEYWORDS: Hubbard model, association, charge density waves, Peierls instability, phase transformations

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