Spectroscopic signatures of spin-charge separation in the quasi-one-dimensional organic conductor TTF-TCNQ

Details Spectroscopic signatures of spin-charge separation in the quasi-one-dimensional organic conductor TTF-TCNQ Spectroscopic signatures of spin-charge separation in the quasi-one-dimensional organic conductor TTF-TCNQ

2002-01-30

arxiv.org/abs/cond-mat/0201561v1

Phys. Rev. Lett. 88, 096402 (2002)

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 4 figures; to appear in PRL

Scientific paper

10.1103/PhysRevLett.88.096402

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 function of temperature. The ARPES data thus show spectroscopic signatures of spin-charge separation on an energy scale of the conduction band width.

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