Physics – Condensed Matter – Materials Science
Scientific paper
2010-11-09
Phys. Rev. B 82, 195114 (2010)
Physics
Condensed Matter
Materials Science
This article is accepted by Physical Review B
Scientific paper
10.1103/PhysRevB.82.195114
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.
Hirai Makoto
Kaji Y.
Kambe Takashi
Kato Taichi
Kawasaki Nobuo
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