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Remnant Fermi Surface in the Presence of an Underlying Instability in Layered 1<i>T</i>–TaS<sub>2</sub>
Auteur(s)
Pillo, Th.
Hayoz, J.
Berger, H.
Grioni, M.
Schlapbach, Louis
Aebi, Philipp
Date de parution
1999
In
Physical Review Letters, American Physical Society (APS), 1999/83/17/3494-3497
Résumé
We report high resolution angle-scanned photoemission and Fermi surface (FS) mapping experiments on the layered transition-metal dichalcogenide 1<i>T</i>–TaS<sub>2</sub> in the quasicommensurate (metallic) and the commensurate (insulating) charge-density-wave (CDW) phase. Instead of a nesting induced partially removed FS in the CDW phase we find a pseudogap over large portions of the FS. This remnant FS exhibits the symmetry of the one-particle normal state FS. Possibly, this Mott localization induced transition represents the underlying instability responsible for the pseudogapped FS.
Identifiants
Type de publication
journal article
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