1. Electronic structure of K-doped picene film on HOPG
- Author
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Yuji Muraoka, Takayoshi Yokoya, Taihei Jabuchi, H Hamada, Hiroyuki Okazaki, and Takanori Wakita
- Subjects
Photoemission spectroscopy ,Binding energy ,Nanotechnology ,02 engineering and technology ,Electronic structure ,01 natural sciences ,Condensed Matter::Materials Science ,chemistry.chemical_compound ,symbols.namesake ,Highly oriented pyrolytic graphite ,Condensed Matter::Superconductivity ,0103 physical sciences ,Physics::Atomic and Molecular Clusters ,General Materials Science ,010306 general physics ,Superconductivity ,Condensed matter physics ,Fermi level ,Doping ,021001 nanoscience & nanotechnology ,Condensed Matter Physics ,Picene ,chemistry ,symbols ,Condensed Matter::Strongly Correlated Electrons ,0210 nano-technology - Abstract
We have performed potassium (K)-doping dependent photoemission (PES) measurements of picene film on highly oriented pyrolytic graphite (HOPG). K-doping dependent valence band PES data exhibits a shift of the valence band to a higher binding energy, indicative of the charge transfer from the K atoms to the picene film. K-doping dependent PES spectra near the Fermi level (E F) show the appearance and disappearance of a Fermi edge, indicating the metallic properties of the film at certain K concentrations. High-resolution PES spectrum at the lowest measured temperature does not show an opening of the superconducting gap, requesting further studies to explore the superconducting properties of the K-doped picene film. The results will be discussed by comparison with previous and recent spectroscopic studies.
- Published
- 2016
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