Angular forces in the lattice dynamics of diamond crystal lattices |
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| Authors: | G Bose BB Tripathi HC Gupta |
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| Institution: | Department of Physics, Indian Institute of Technology, Hauz Khas, New Delhi-29, India;Deparment of Physics, Kirori Mal College, University of Delhi, Delhi-7, India |
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| Abstract: | The lattice dynamics of the diamond lattice has been investigated using a model in which the interatomic forces include, in addition to central forces, the angular forces of the type employed by de Launay and Clark, Gazis and Wallis. The 2 models have been applied to silicon and germanium to investigate the phonon dispersion curves in the three symmetry directions of the Brillioun zone. The results are found to be qualitatively in good agreement with experiments. |
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