Electronic structure of K-doped picene film on HOPG

Takanori Wakita, H. Okazaki, T. Jabuchi, H. Hamada, Yuji Muraoka, Takayoshi Yokoya

Research output: Contribution to journalArticle

1 Citation (Scopus)

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.

Original languageEnglish
Article number064001
JournalJournal of Physics Condensed Matter
Volume29
Issue number6
DOIs
Publication statusPublished - Feb 15 2017

Keywords

  • electronic structure
  • K-doped picene
  • photoemission spectroscopy

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

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