The contribution of intercalate to the electronic structure and transport properties for potassium-oxygen-graphite intercalation compounds

Tetsuo Yamashita, Toshiaki Enoki, Takayuki Miyamae, Takafumi Miyazaki

Research output: Contribution to journalArticle

Abstract

The ultraviolet photoelectron spectra measurements for 1st and 2nd stage potassium-oxygen-graphite intercalation compounds (KOx-GICs) were carried out for the electronic structure around the Fermi level EF. The dependence of the photoelectron spectra upon the incident photon energy suggests the presence of the oxygen electronic states around EF. The temperature dependence of the thermoelectric power (TEP) of KOx-GICs reveals the positive TEP below around 150 K for 1st stage compound, which suggests the contribution of hole carriers to the transport properties in contrast to the expectation of negative TEP endorsed by the donor type character of KOx-GICs. These experimental findings prove the contribution of intercalate to the electronic structure and transport properties.

Original languageEnglish
Pages (from-to)243-248
Number of pages6
JournalMolecular Crystals and Liquid Crystals Science and Technology Section A: Molecular Crystals and Liquid Crystals
Volume310
DOIs
Publication statusPublished - Jan 1 1998
Externally publishedYes

Keywords

  • Electronic structure
  • Graphite intercalation compounds
  • Photoelectron spectra
  • Thermoelectric power

ASJC Scopus subject areas

  • Condensed Matter Physics

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