Length dependent thermal conduction in germanene/stanene heterobilayer by using molecular dynamics simulations

Abstract

Of late, stanene and germanene having the effect of spin orbital coupling are characterized as a superconductive material at room temperature. These materials have been synthesized and investigated their low thermal conductivity in recent experimental studies. With the purpose of achieving diverse thermal properties, we have modeled and offered germanene/stanene heterobilayer. We have also characterized its in-plane thermal conduction with varying length. For the assessment its thermal properties, we employed a simulation method named reverse non equilibrium molecular dynamics. The nanosheet size in the x direction ranges from 20 to 300 nanometer. The amount of thermal transport of this heterobilayer is predicted to be 19.95 W m−1 K−1 over an unlimited length. In this work, the van der Waals thickness is used to predict this thermal transmission. The length of the nanosheet appears to boost the in-plane heat conduction of the germanene/stanene bilayer. For a better understanding of in-plane thermal conduction, the phonon density of states is determined. The characterization of germanene/stanene nanostructure proposed in this study would give a decent knowledge to make it a promising bilayer for the thermoelectric applications owing to its low thermal conductivity.