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.
|Number of pages||4|
|Journal||Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers|
|Issue number||12 A|
|Publication status||Published - 1996 Dec|
- Valence band
ASJC Scopus subject areas
- Physics and Astronomy(all)