LATTICE VIBRONIC PROPERTIES OF CARBON AND SILICON FROM AB-INITIO CALCULATIONS

To transit from silicon-based electronic technology to the new emerging carbon-based electronic technology, phonon behaviour of two tetrahedral element, carbon and silicon is investigated. Having determined phonon frequencies and phonon density of state ofcarbon and silicon, we have shown that, phonons in diamond have higher frequencies. Furthermore, compared to silicon, electron-phonon scattering in diamond are of inelastic character and is stronger. In addition, carriers in diamond show polaronic character.

Keywords:

Density Functional Theory , Phonon , diamond , silicon