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On the crossing feature of phonon dispersion curves in lithium

✍ Scribed by A.R. Jani; V.B. Gohel

Publisher
Elsevier Science
Year
1982
Tongue
English
Weight
203 KB
Volume
43
Category
Article
ISSN
0038-1098

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## Abstract A purely mathematical heuristic model is examined in order to explain the existence of an avoided crossing between two dispersion curves calculated for a certain potential energy surface designed to simulate the dynamics of a linear polyethylene chain. The model shows that a third mode