Because of unique physical properties, graphene, a 2D honeycomb arrangement of carbon atoms, has attracted
tremendous attention. Silicene, the graphene equivalent for silicon, could follow this trend, opening new perspectives for
applications, especially due to its compatibility with Si-based electronics. Silicene has been theoretically predicted as a buckled
honeycomb arrangement of Si atoms and having an electronic dispersion resembling that of relativistic Dirac fermions. We
calculate theoretically in this article, the amplification and attenuation of acoustic phonons due to an external temperature
gradient in Silicene at temperature ࢀ= 77K in the hypersound regime. The dependence of normalized amplification or
attenuation on the frequency wasnumerically evaluated. It is observed from our calculations that when the temperature gradient
is zero, absorption of acoustic phonons occurs and when temperature gradient is greater than zero, absorption switches to
amplification of acoustic phonons.
