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Title: Finite-Frequency Optical Absorption in 1D Conductors and Mott-Hubbard Insulators

Abstract

The frequency-dependent conductivity is studied for the one-dimensional Hubbard model, using a selection rule, the Bethe ansatz, and symmetries associated with conservation laws. For densities where the system is metallic the absorption spectrum has two contributions, a Drude peak at {omega}=0 separated by a pseudogap from a broad absorption band whose lower edge is characterized by a nonclassical critical exponent. Our findings shed new light on the ''far infrared puzzle'' and other optical properties of metallic organic chain compounds. (c) 2000 The American Physical Society.

Authors:
 [1];  [2];  [3];  [4]
  1. CNLS, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)
  2. (Portugal)
  3. Department of Physics, University of Evora, Apartado 94, P-7002-554 Evora, (Portugal)
  4. Departamento de Fisica and CFIF, IST, Avenida Rovisco Pais, P-1049-001 Lisboa, (Portugal)
Publication Date:
OSTI Identifier:
20216595
Resource Type:
Journal Article
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 84; Journal Issue: 20; Other Information: PBD: 15 May 2000; Journal ID: ISSN 0031-9007
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ONE-DIMENSIONAL CALCULATIONS; ELECTRIC CONDUCTIVITY; HUBBARD MODEL; FREQUENCY DEPENDENCE; SELECTION RULES; CONSERVATION LAWS; ABSORPTION SPECTRA; ORGANOMETALLIC COMPOUNDS; THEORETICAL DATA

Citation Formats

Carmelo, J. M. P., Department of Physics, University of Evora, Apartado 94, P-7002-554 Evora,, Peres, N. M. R., and Sacramento, P. D. Finite-Frequency Optical Absorption in 1D Conductors and Mott-Hubbard Insulators. United States: N. p., 2000. Web. doi:10.1103/PhysRevLett.84.4673.
Carmelo, J. M. P., Department of Physics, University of Evora, Apartado 94, P-7002-554 Evora,, Peres, N. M. R., & Sacramento, P. D. Finite-Frequency Optical Absorption in 1D Conductors and Mott-Hubbard Insulators. United States. doi:10.1103/PhysRevLett.84.4673.
Carmelo, J. M. P., Department of Physics, University of Evora, Apartado 94, P-7002-554 Evora,, Peres, N. M. R., and Sacramento, P. D. Mon . "Finite-Frequency Optical Absorption in 1D Conductors and Mott-Hubbard Insulators". United States. doi:10.1103/PhysRevLett.84.4673.
@article{osti_20216595,
title = {Finite-Frequency Optical Absorption in 1D Conductors and Mott-Hubbard Insulators},
author = {Carmelo, J. M. P. and Department of Physics, University of Evora, Apartado 94, P-7002-554 Evora, and Peres, N. M. R. and Sacramento, P. D.},
abstractNote = {The frequency-dependent conductivity is studied for the one-dimensional Hubbard model, using a selection rule, the Bethe ansatz, and symmetries associated with conservation laws. For densities where the system is metallic the absorption spectrum has two contributions, a Drude peak at {omega}=0 separated by a pseudogap from a broad absorption band whose lower edge is characterized by a nonclassical critical exponent. Our findings shed new light on the ''far infrared puzzle'' and other optical properties of metallic organic chain compounds. (c) 2000 The American Physical Society.},
doi = {10.1103/PhysRevLett.84.4673},
journal = {Physical Review Letters},
issn = {0031-9007},
number = 20,
volume = 84,
place = {United States},
year = {2000},
month = {5}
}