Coupled theoretical interpretation and experimental investigation of the anisotropy of the lattice thermal conductivity of Bi2Te3 single crystal

► Prediction of the anisotropy of the lattice thermal conductivity. ► Provide a definition of the cutoff frequencies that makes sense. ► Reduction of the number of frees parameter in phenomenological model. ► Prediction that the anisotropy is a function of the scattering mechanism. ► Means of experimental verification of theory.