6533b82bfe1ef96bd128e125
RESEARCH PRODUCT
Coupled rotational and translational modes in the mixed molecular crystal KBr1?x (CN) x
D. DurandAlois LoidlJens-boie SuckR. FeileJ. DaubertB. RenkerK. Knorrsubject
CrystalMaxima and minimaCouplingMaterials sciencePhononPhase (matter)MoleculeAtomic physicsCondensed Matter PhysicsInelastic neutron scatteringExcitationElectronic Optical and Magnetic Materialsdescription
TheE g andT 2g acoustic phonon modes of the molecular crystals KBr0.96(CN)0.04 and KBr0.86(CN)0.14 have been investigated by inelastic neutron scattering at 6, 90 and 300 K. Clear resonances due to mode-mode coupling to molecular excitations were observed. In complementary ultrasonic experiments the elastic constants were found to pass through minima as a function of temperature. The results were quantitavely explained by a model which assumes simple forms of the molecular excitation spectrum. An alternative interpretation, though being only qualitative, postulates a freezing of the CN molecules into a glass-like phase.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1980-09-01 | Zeitschrift f�r Physik B Condensed Matter |