Spectroscopic Signatures of Spin-Charge Separation in the Quasi-One-Dimensional Organic Conductor TTF-TCNQ

R. Claessen, M. Sing, U. Schwingenschlögl, P. Blaha, M. Dressel, and C. S. Jacobsen
Phys. Rev. Lett. 88, 096402 – Published 13 February 2002
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Abstract

The electronic structure of the quasi-one-dimensional organic conductor TTF-TCNQ is studied by angle-resolved photoelectron spectroscopy (ARPES). The experimental spectra reveal significant discrepancies to band theory. We demonstrate that the measured dispersions can be consistently mapped onto the one-dimensional Hubbard model at finite doping. This interpretation is further supported by a remarkable transfer of spectral weight as a function of temperature. The ARPES data thus show spectroscopic signatures of spin-charge separation on an energy scale of the conduction bandwidth.

  • Received 1 August 2001

DOI:https://doi.org/10.1103/PhysRevLett.88.096402

©2002 American Physical Society

Authors & Affiliations

R. Claessen1, M. Sing1, U. Schwingenschlögl1, P. Blaha2, M. Dressel3, and C. S. Jacobsen4

  • 1Experimentalphysik II, Universität Augsburg, D-86135 Augsburg, Germany
  • 2Institut für Physikalische und Theoretische Chemie, Technische Universität Wien, A-1060 Wien, Austria
  • 31. Physikalisches Institut, Universität Stuttgart, D-70550 Stuttgart, Germany
  • 4Department of Physics, Technical University of Denmark, DK-2800 Lyngby, Denmark

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Vol. 88, Iss. 9 — 4 March 2002

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