The intermediate-range order in molten and glassy GeSe2

Conference · Thu Sep 01 00:00:00 EDT 1988

OSTI ID:6618092

Iyetomi, H; Vashishta, P; Kalia, R K

The first sharp diffraction peak (FSDP) observed around 1 /angstrom//sup /minus/1/ in the x-ray and neutron scattering experiments on the molten and vitreous GeSe2 reflects existence of an intermediate-range correlation beyond the nearest-neighbor distances. The FSDP is also observed in other chalcogenide glasses, such as SiO2, GeO2, SiSe2, and As2Se3. The origin of the FSDP, ranging from layerlike correlations to random packing of basic structural units, is thus the current point at issue. The purpose of the present paper is to provide a microscopic understanding of the physical nature of the intermediate-range order in terms of interatomic potentials. 18 refs., 7 figs.

• Research Organization: Argonne National Lab., IL (USA)
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 6618092
• Report Number(s): CONF-880623-5; ON: DE89005855
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360602* -- Other Materials-- Structure & Phase Studies
BOND LENGTHS
CHALCOGENIDES
COHERENT SCATTERING
DIFFRACTION
DIMENSIONS
DISTANCE
GERMANIUM COMPOUNDS
GERMANIUM SELENIDES
GLASS
INTERATOMIC DISTANCES
LENGTH
MATHEMATICAL MODELS
MOLECULAR MODELS
MOLECULAR STRUCTURE
NEUTRON DIFFRACTION
SCATTERING
SELENIDES
SELENIUM COMPOUNDS
X-RAY DIFFRACTION