Valence band structure of Si-As-Te chalcogenide glasses prepared in the gravity environment of the earth and in a microgravity environment in space

Wahid Shams-Kolahi, Michihiro Kobayashi, Hiromasa Hanzawa, Tomohiro Kubota, Hikaru Kobayashi, Hiroaki Okamoto, Shoichi Endo, Yuki Kobayashi, Yoshihiro Hamakawa

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Photoemission spectra have been measured for two kinds of Si9As14Te21 chalcogenide glasses, prepared in the gravity environment of the earth and in a microgravity environment in space, respectively. The valence band structures of both of the glasses are in general similar, but exhibit a distinct difference close to the Fermi level. The top of the valence band states splits into a non-bonding level and a bonding level. The bonding/non-bonding splitting is smaller for space-made material than for its terrestrial-made counterpart. The X-ray Photoelectron Spectra indicate that the top of the valence band has a non-bonding lone-pair characteristic in the case of terrestrial-made material and a covalent bonding characteristic in the case of space-made material.

Original languageEnglish
Pages (from-to)6162-6165
Number of pages4
JournalJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Volume35
Issue number12 A
Publication statusPublished - 1996 Dec 1

Keywords

  • Chalcogenide
  • Microgravity
  • Photoemission
  • Pressure
  • Valence band
  • XPS

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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