Ultra-low lattice thermal conductivity and high thermoelectric performance in chiral phonon-protected heterostructures

in MoSeTe/WSeTe HS. The disparity in computing carrier mobility using deformation potential theory (DPT) is addressed herein, and to rectify the inconsistency, we additionally incorporate the Fröhlich interaction, which accounts for longitudinal optical phonons in estimating the carrier mobility accurately. Overall, the present work exploits the intrinsic properties of chiral phonons through breaking the crystal inversion symmetry, providing important insights into the rational design of low-dimensional thermoelectric materials.