M Haluska et al 1999 J. Phys.: Condens. Matter 11 1009 doi:10.1088/0953-8984/11/4/008
Acoustic phonon dispersion in single-crystal 
M Haluska
, D Havlik
, G Kirlinger§ and W Schranz
The longitudinal elastic constants of 
single crystals were measured in the 
and 
directions near 
by an ultrasonic CW resonance technique in the MHz region. The comparison with previous low-frequency (f = 1 Hz) elastic measurements yields a huge acoustic phonon dispersion near 
. We show that the dispersion is due to the crossover from isothermal to adiabatic behaviour.
- PACS
-
63.20.D- Phonon states and bands, normal modes, and phonon dispersion
62.65.+k Acoustical properties of solids
81.40.Jj Elasticity and anelasticity, stress-strain relations
- Subjects
- Dates
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Issue 4 (1 February 1999)
Received 8 July 1998, in final form 16 September 1998
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Acoustic phonon dispersion in single-crystal
M Haluska et al 1999 J. Phys.: Condens. Matter 11 1009
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