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2 results on '"Snoke DW"'

1. Mechanism of orthoexciton-to-paraexciton conversion inCu2O

Author

Snoke Dw, Trauernicht Dp, and J. P. Wolfe

Subjects
chemistry.chemical_classification, Physics, chemistry, Phonon, Exciton, Exchange interaction, Physical chemistry, Inorganic compound
Abstract

On propose qu'a basse densite cette conversion intervient via l'emission ou l'absorption d'un phonon acoustique unique. Les vitesses obtenus a partir de ce mecanisme sont coherentes avec celles determinees par d'autres methodes et avec les intensites de luminescence mesures en fonction de la temperature et des contraintes

Published
1990
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2. Optical absorption spectrum ofC60at high pressure

Author

Mittelbach A, Syassen K, and Snoke Dw

Subjects
Bulk modulus, Materials science, Fullerene, Absorption spectroscopy, Band gap, business.industry, Analytical chemistry, macromolecular substances, Pressure range, Optics, stomatognathic system, Absorption edge, Amorphous carbon, High pressure, business
Abstract

We report measurements of the optical absorption spectrum of solid C 60 in the pressure range from 0 to 40 GPa. At low pressure we find a linear shift of the absorption edge of -0.14 eV/GPa eV. Above 20 GPa, the fullerenes transform irreversibly to amorphous carbon; we find no evidence of transparency greater than that of amorphous carbon produced by other means

Published
1993
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