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Optical conductivity of the one-dimensional dimerized Hubbard model at quarter filling

  • Solid and Condensed State Physics
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Abstract.

We investigate the optical conductivity in the Mott insulating phase of the one-dimensional extended Hubbard model with alternating hopping terms (dimerization) at quarter band filling. Optical spectra are calculated for the various parameter regimes using the dynamical density-matrix renormalization group method. The study of limiting cases allows us to explain the various structures found numerically in the optical conductivity of this model. Our calculations show that the dimerization and the nearest-neighbor repulsion determine the main features of the spectrum. The on-site repulsion plays only a secondary role. We discuss the consequences of our results for the theory of the optical conductivity in the Bechgaard salts.

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Authors and Affiliations

  1. Fachbereich Physik, Philipps-Universität, 35032, Marburg, Germany

    H. Benthien

  2. Institut für Physik, Johannes Gutenberg-Universität, 55099, Mainz, Germany

    E. Jeckelmann

Authors
  1. H. Benthien
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  2. E. Jeckelmann
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Correspondence to E. Jeckelmann.

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Benthien, H., Jeckelmann, E. Optical conductivity of the one-dimensional dimerized Hubbard model at quarter filling. Eur. Phys. J. B 44, 287–297 (2005). https://doi.org/10.1140/epjb/e2005-00128-1

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