Electronic structure of K-doped picene film on HOPG. (21st December 2016)

• Record Type: Journal Article
• Authors: Wakita, T; Okazaki, H; Jabuchi, T; Hamada, H; Muraoka, Y; Yokoya, T
• Is Part Of: Journal of physics. Volume 29:Number 6(2017)
• Publication Date: 2016-12-21
• Subjects: K-doped picene -- electronic structure -- photoemission spectroscopy; Condensed matter -- Periodicals; Matière condensée -- Périodiques; Vaste stoffen; Vloeistoffen; Natuurkunde; Electronic journals; Computer network resources; 530.4105
• DOI: 10.1088/1361-648X/29/6/064001
• Languages: English
• ISSNs: 0953-8984

Abstract

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.