Lattice Vibrations and Defect-Induced Vibrational Properties in Cubic SiC

1987 ◽  
Vol 97 ◽  
Author(s):  
P. J. Lin-Chung
Keyword(s):  
Phonon Dispersion ◽  
Vibrational Properties ◽  
Quadratic Potential ◽  
Native Defects ◽  
Defect Complexes ◽  
Interstitial Defects ◽  
Different Types ◽  
Bulk Phonon ◽  
Antisite Defects ◽  
Phonon Dispersion Relations

ABSTRACTA theoretical study of both the bulk phonon dispersion relations in cubic SiC and the vibrational properties induced by native defects is presented. The Keating Hamiltonian is used for the quadratic potential energy of the system, and the supercell approach is employed to treat the defect problem. The defect complexes considered are antisite defects, divacancy defects, and three different types of carbon di-interstitial defects.

scholarly journals Acoustic Phonons in Nanowires with Embedded Heterostructures

2011 ◽  
Vol 2011 ◽  
pp. 1-7 ◽  
Author(s):  
Hussein M. Ayedh ◽  
Andreas Wacker
Keyword(s):  
Continuum Model ◽  
Phonon Dispersion ◽  
Dispersion Relations ◽  
Structure Parameters ◽  
Acoustic Phonons ◽  
Elastic Continuum ◽  
Isotropic Approximation ◽  
Different Types ◽  
The Impact ◽  
Phonon Dispersion Relations

Acoustic phonons are studied in finite nanowires based on the elastic continuum model. The phonon dispersion relations are compared for different types of approximations both for pure nanowires and nanowire heterostructures including cubic and wurtzite materials. We find that the isotropic approximation highly underestimates the frequency of torsional modes. The impact of heterostructures on the lowest modes is rather weak and can be described by an average of the different structure parameters.

Phonon Dispersion Relations in the Bi0.95Sb0.05 Alloy

1981 ◽  
Vol 104 (1) ◽  
pp. 97-102 ◽  
Author(s):  
J. Sosnowski ◽  
S. Bednarski ◽  
W. Bührer ◽  
A. Czachor ◽  
E. Maliszewski
Keyword(s):  
Phonon Dispersion ◽  
Dispersion Relations ◽  
Phonon Dispersion Relations
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