Lokalisierte Schwingungszustände von Punktdefekten im einfach kubischen Gitter
Lokalisierte Schwingungszustände von Punktdefekten im einfach kubischen Gitter
Frequencies of localized vibrations in a simple cubic lattice are discussed, using a simplified model with nearest neighbour interaction only. The modes are determinedby group-theoretical considerations. The frequencies are given in terms of tabulated functions. A substitutional impurity and a vacan...
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Personal Name(s): | Lengeler, B. |
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Ludwig, W. | |
Contributing Institute: |
Publikationen vor 2000; PRE-2000; Retrocat |
Imprint: |
Jülich
Kernforschungsanlage Jülich, Verlag
1963
|
Physical Description: |
p. 273-90 |
Document Type: |
Report Book |
Research Program: |
ohne Topic |
Series Title: |
Berichte der Kernforschungsanlage Jülich
120 |
Link: |
OpenAccess OpenAccess |
Publikationsportal JuSER |
Frequencies of localized vibrations in a simple cubic lattice are discussed, using a simplified model with nearest neighbour interaction only. The modes are determinedby group-theoretical considerations. The frequencies are given in terms of tabulated functions. A substitutional impurity and a vacancy can be describedapproximately by this model. lt turns out that a vacancy does not show localized vibrations. An approximation method is discussed and compared with the exactresults. lt gives good results if the vibration is strongly localized, and it can easily be extended to other lattices. |