How could I calculate phonon group velocity for longitudinal and transverse modes for different binary semiconductor ?
To calculate group velocity for each longitudinal and transverse we can use the following article:
Hou, H. J., et al. "Structural, elastic and thermodynamic properties of rock-salt structure CdSe at high temperature and high pressure,”." Chalcogenide letters 11.3 (2014): 121-128.
and for debye temperature we may use:
Morelli, D. T., J. P. Heremans, and G. A. Slack. "Estimation of the isotope effect on the lattice thermal conductivity of group IV and group III-V semiconductors." Physical Review B 66.19 (2002): 195304.
Yes,as Roman mentioned ,group velocity depends upon dimension so one need to calculate accordingly
To calculate group velocity for each longitudinal and transverse we can use the following article:
Hou, H. J., et al. "Structural, elastic and thermodynamic properties of rock-salt structure CdSe at high temperature and high pressure,”." Chalcogenide letters 11.3 (2014): 121-128.
and for debye temperature we may use:
Morelli, D. T., J. P. Heremans, and G. A. Slack. "Estimation of the isotope effect on the lattice thermal conductivity of group IV and group III-V semiconductors." Physical Review B 66.19 (2002): 195304.
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