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Phonon Dispersion Curves of BeSe and BeTe
Author(s) -
DoyenLang S.,
Pages O.,
Lang L.,
Hugel J.
Publication year - 2002
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/1521-3951(200201)229:1<563::aid-pssb563>3.0.co;2-g
Subject(s) - phonon , polarization (electrochemistry) , dispersion (optics) , dispersion relation , condensed matter physics , physics , classical mechanics , statistical physics , quantum mechanics , chemistry
The purpose of our study is to calculate the phonon dispersion curves of BeSe and BeTe. Owing to the few available data, a simple model demanding only a reduced set of force constant‐parameters is required. A well‐adapted model is the one of De Launay (Solid State Phys. 3 , 203 (1957)) based on atomic central and angular forces. The model has been implemented by introducing the polarization field into the dynamical equations for the longitudinal modes.