A. Mavrokefalos, Nguyen, N. T., Pettes, M. T., Johnson, D. C., and Shi, L., “In-Plane Thermal Conductivity of Disordered Layered WSe2 and (W)x(WSe2)y Superlattice Films,” Appl. Phys. Lett., vol. 91, pp. 17912, 2007.
It was recently reported that misoriented layered WSe2 and (W)x(WSe2)yfilms possess extremely low cross-plane thermal conductivity. Here, we report that the in-plane thermal conductivity results for WSe2 and W4(WSe2)10films measured by using a suspended device are about 30 times higher than the cross-plane values because of the in-plane ordered and cross-plane disordered structures and about six times lower than that of compacted single-crystalWSe2 platelets. The additional W layers in the W4(WSe2)10films were found to greatly increase the in-plane electrical conductivity relative to the WSe2films, but reduce the in-plane lattice thermal conductivity assuming the Wiedemann-Franz law.