Photoemission study of Ca-intercalated graphite superconductor CaC 6

Hiroyuki Okazaki, Rikiya Yoshida, Keisuke Iwai, Kengo Noami, Takayuki Muro, Tetsuya Nakamura, Takanori Wakita, Yuji Muraoka, Masaaki Hirai, Fumiaki Tomioka, Yoshihiko Takano, Asami Takenaka, Masahiro Toyoda, Tamio Oguchi, Takayoshi Yokoya

Research output: Contribution to journalArticle

Abstract

In this work, we have performed resonant photoemission studies of Ca-intercalated graphite superconductor CaC6. Using photon energy of the Ca 2p-3d threshold, the photoemission intensity of the peak at Fermi energy (EF) is resonantly enhanced. This result provides spectroscopic evidence for the existence of Ca 3d states at EF, and strongly supports that Ca 3d state plays a crucial role for the superconductivity of this material with relatively high Tc.

Original languageEnglish
Pages (from-to)S637-S638
JournalPhysica C: Superconductivity and its applications
Volume470
Issue numberSUPPL.1
DOIs
Publication statusPublished - Dec 1 2010

Keywords

  • CaC
  • Graphite intercalation compound
  • Resonant photoemission spectroscopy

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

Fingerprint Dive into the research topics of 'Photoemission study of Ca-intercalated graphite superconductor CaC <sub>6</sub>'. Together they form a unique fingerprint.

  • Cite this

    Okazaki, H., Yoshida, R., Iwai, K., Noami, K., Muro, T., Nakamura, T., Wakita, T., Muraoka, Y., Hirai, M., Tomioka, F., Takano, Y., Takenaka, A., Toyoda, M., Oguchi, T., & Yokoya, T. (2010). Photoemission study of Ca-intercalated graphite superconductor CaC 6. Physica C: Superconductivity and its applications, 470(SUPPL.1), S637-S638. https://doi.org/10.1016/j.physc.2009.10.039