Band mapping and quasiparticle suppression in the one-dimensional organic conductor TTF-TCNQ
Résumé
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 kF in this material, and the observation of the opening of a Peierls gap in the low-temperature charge density wave phase.
Mots clés
- Electronic structure
- Organic conductors
- Tetrathiafulvalene tetracyanoquinodimethane
- Quasiparticle suppression
- Peierls gap
- Low temperature charge density wave phase
- Band mapping
- Scanning tunneling microscopy
- Paramagnetic resonance
- Mathematical techniques
- Mathematical models
- Light emission
- Fermi level
- Energy gap
- Electronic density of states
- Band structure
- Aromatic compounds
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