The effect of built in polarization on thermal conductivity of AlN

AlN is a promising material for high power optoelectronic devices. The built-in-polarization is a unique and peculiar property which affects optical and thermal properties of AlN. Our theoretical calculation shows that polarization mechanism enhances the thermal property of AlN. We estimated elastic constant, Debye frequency, Debye temperature and the thermal conductivity of AlN. Analysis shows that these parameters are significantly enhanced by the polarization effect. The revised thermal conductivity at room temperature is found to be increased by 20% in AlN. The result can be used for simulation of heat energy in the active region of AlN optoelectronic devices to minimize the self heating.