TY - JOUR
T1 - Electronic structure of K-doped picene film on HOPG
AU - Wakita, T.
AU - Okazaki, H.
AU - Jabuchi, T.
AU - Hamada, H.
AU - Muraoka, Y.
AU - Yokoya, T.
N1 - Funding Information:
We thank K Prassides and A Goldoni for valuable discussions. We thank Y Kubozono and T Kambe for providing picene samples and valuable discussions. Preliminary PES studies were performed at BL-5, HiSOR, and at SPring-8 (No. 2009B1697, 2012B1692 and 2013B1708). This study was partially supported by a Grant-in-Aid for Scientific Research on Innovative Areas Heavy Electrons (No. 20102003) and on Scientific Research (B) (No. 24340086) from the Ministry of Education, Culture, Sports, Science, and Technology of Japan (MEXT)
Publisher Copyright:
© 2016 IOP Publishing Ltd.
PY - 2017/2/15
Y1 - 2017/2/15
N2 - 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.
AB - 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.
KW - K-doped picene
KW - electronic structure
KW - photoemission spectroscopy
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U2 - 10.1088/1361-648X/29/6/064001
DO - 10.1088/1361-648X/29/6/064001
M3 - Article
C2 - 28002037
AN - SCOPUS:85012070610
SN - 0953-8984
VL - 29
JO - Journal of Physics Condensed Matter
JF - Journal of Physics Condensed Matter
IS - 6
M1 - 064001
ER -