Electronic structure of pristine and K-doped solid picene: Nonrigid band change and its implication for electron-intramolecular-vibration interaction

H. Okazaki, Takanori Wakita, T. Muro, Y. Kaji, X. Lee, H. Mitamura, N. Kawasaki, Yoshihiro Kubozono, Y. Yamanari, Takashi Kambe, T. Kato, M. Hirai, Yuji Muraoka, Takayoshi Yokoya

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Abstract

We use photoemission spectroscopy to study electronic structures of pristine and K-doped solid picene. The valence band spectrum of pristine picene consists of three main features with no state at the Fermi level (EF) while that of K-doped picene has three structures similar to those of pristine picene with new states near EF, consistent with the semiconductor-metal transition. The K-induced change cannot be explained with a simple rigid-band model of pristine picene but can be interpreted by molecular-orbital calculations considering electron-intramolecular-vibration interaction. Excellent agreement of the K-doped spectrum with the calculations points to importance of electron-intramolecular-vibration interaction in K-doped picene.

Original languageEnglish
Article number195114
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume82
Issue number19
DOIs
Publication statusPublished - Nov 10 2010

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ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

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