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 (KO x-GICs) were carried out for the electronic structure around the Fermi level E F. The dependence of the photoelectron spectra upon the incident photon energy suggests the presence of the oxygen electronic states around E F. The temperature dependence of the thermoelectric power (TEP) of KO x-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 KO x-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
Publication statusPublished - 1998
Externally publishedYes

Fingerprint

Electron transport properties
Intercalation compounds
Thermoelectric power
intercalation
Electronic structure
Potassium
potassium
photoelectrons
graphite
transport properties
Oxygen
Photoelectrons
electronic structure
oxygen
Electronic states
Fermi level
Transport properties
temperature dependence
photons
Photons

Keywords

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

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

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T1 - The contribution of intercalate to the electronic structure and transport properties for potassium-oxygen-graphite intercalation compounds

AU - Yamashita, Tetsuo

AU - Enoki, Toshiaki

AU - Miyamae, Takayuki

AU - Miyazaki, Takafumi

PY - 1998

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AB - The ultraviolet photoelectron spectra measurements for 1st and 2nd stage potassium-oxygen-graphite intercalation compounds (KO x-GICs) were carried out for the electronic structure around the Fermi level E F. The dependence of the photoelectron spectra upon the incident photon energy suggests the presence of the oxygen electronic states around E F. The temperature dependence of the thermoelectric power (TEP) of KO x-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 KO x-GICs. These experimental findings prove the contribution of intercalate to the electronic structure and transport properties.

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