Direct observation of Coulomb interactions in highly conducting [2,5-dimethyl-dicyanoquinonediimine]2Ag
- 15 August 1993
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 48 (7) , 4891-4894
- https://doi.org/10.1103/physrevb.48.4891
Abstract
Valence-band photoelectron spectroscopy and scanning-tunneling microscopy demonstrate the significance of Coulomb interactions for the semiconducting state of single crystalline [2,5-dimethyl-dicyanoquinonediimineAg. Direct evidence for the electron-electron interactions is deduced from the spectroscopic observation of a pseudogap in the density of states near the Fermi energy and from the dimerization in real space observed by tunneling microscopy.
Keywords
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