title: Spectroscopic signatures of spin-charge separation in the quasi-one-dimensional organic conductor TTF-TCNQ.
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.
authors.affiliation: Experimentalphysik II, Universität Augsburg, D-86135 Augsburg, Germany.
authors.forename: R
authors.initials: R
authors.lastname: Claessen
authors.forename: M
authors.initials: M
authors.lastname: Sing
authors.forename: U
authors.initials: U
authors.lastname: Schwingenschlögl
authors.forename: P
authors.initials: P
authors.lastname: Blaha
authors.forename: M
authors.initials: M
authors.lastname: Dressel
authors.forename: C S
authors.initials: CS
authors.lastname: Jacobsen