EXPERIMENTAL ELECTRONIC-STRUCTURE OF A 1D ORGANIC METAL - TTF-TCNQ

We exploited angle-resolved photoelectron spectroscopy (ARPES) with hi gh energy resolution to map the band structure of the typical one-dime nsional organic conductor TTF-TCNQ. We directly observe dispersing spe ctral features corresponding to the donor (TTF) and acceptor (TCNQ) ba nds, and their crossing at the Fermi wavevector k(F). Near the chemica l potential, however, the quasiparticle peak are completely renormaliz ed away, and the spectrum is totally incoherent. The suggest that we h ave observed the dispersion and spectral function of a metallic non-Fe rmi liquid.