Band mapping and quasiparticle suppression in the one-dimensional organic conductor TTF-TCNQ
Dispersing 1D bands have been observed for the first time in an organic conductor by high resolution photoemission experiments on TTF-TCNQ (tetrathiafulvalene-tetracyanoquinodimethane). Their properties are extremely unusual: the bandwidth is much larger than traditional estimates, and the quasiparticle states are strongly renormalized, with no weight at the chemical potential. A deep pseudogap around the Fermi energy persists, and even increases, up to room temperature. We also report a direct determination of k(F) in this material, and the observation of the opening of a Peierls gap in the low-temperature charge density wave phase.
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Keywords: METAL-INSULATOR-TRANSITION ; LUTTINGER-LIQUID BEHAVIOR ; ELECTRONIC-STRUCTURE ; TETRATHIAFULVALENE-TETRACYANOQUINODIMETHANE ; NORMAL-STATE ; PHOTOEMISSION ; SUPERCONDUCTORS ; SURFACE ; SPECTROSCOPY ; MODEL
Ecole Polytech Fed Lausanne, Inst Phys Appl, CH-1015 Lausanne, Switzerland. Univ Paris Sud, Phys Solides Lab, F-91405 Orsay, France. Univ Wisconsin, Dept Phys, Madison, WI 53706 USA. Univ Bayreuth, D-95440 Bayreuth, Germany. Zwick, F, Ecole Polytech Fed Lausanne, Inst Phys Appl, CH-1015 Lausanne, Switzerland.
ISI Document Delivery No.: 125HR
Record created on 2006-10-03, modified on 2016-08-08