Surface characterization and surface electronic structure of organic quasi-one-dimensional charge transfer salts

Details Surface characterization and surface electronic structure of organic quasi-one-dimensional charge transfer salts Surface characterization and surface electronic structure of organic quasi-one-dimensional charge transfer salts

2002-08-22

arxiv.org/abs/cond-mat/0208422v3

Physics

Condensed Matter

11 pages, 12 figures, v2: minor changes in text and figure labelling

Scientific paper

10.1103/PhysRevB.67.125402

We have thoroughly characterized the surfaces of the organic charge-transfer salts TTF-TCNQ and (TMTSF)2PF6 which are generally acknowledged as prototypical examples of one-dimensional conductors. In particular x-ray induced photoemission spectroscopy turns out to be a valuable non-destructive diagnostic tool. We show that the observation of generic one-dimensional signatures in photoemission spectra of the valence band close to the Fermi level can be strongly affected by surface effects. Especially, great care must be exercised taking evidence for an unusual one-dimensional many-body state exclusively from the observation of a pseudogap.

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