Properties of IR-active lattice vibrations in the vicinity of kinks in the Frenkel-Kontorova model |
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Authors: | V M Burlakov M A Moskalenko |
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Institution: | (1) Institute of Spectroscopy, Russian Academy of Sciences, 142092 Troitsk, Moscow Region, Russia |
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Abstract: | The properties of infrared lattice vibrations in the presence of kinks in the Frenkel-Kontorova model are analyzed. Our results
show that the vibration of particles involved in kink formation is very similar to that in a gap mode around a force-constant
defect. We found that the IR phonon mode intensity possesses a universal dependence on a certain combination of system parameters and kink concentration.
On the basis of these results a criterion is proposed for separating the regime of weakly interacting kinks in the system
from the regime of a kink lattice.
Pis’ma Zh. éksp. Teor. Fiz. 65, No. 10, 750–754 (25 May 1997)
Published in English in the original Russian journal. Edited by Steve Torstveit. |
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