Thermal and Electronic Properties of Exfoliated Metal Chalcogenides

The thermal conductivity of layered metal chalcogenides such as MT2 (M = Mo, W, T = S. Se) shows a marked decrease after exfoliation and subsequent restacking process Random stacking of two-dimensional crystalline sheets circumvents thermal conduction pathways along a longitudinal direction, which results in a reduction in thermal conductivity WS2 and WSe2 compounds retain p-type conducting behavior after exfoliation and restacking with decreased electrical conductivity due to the change in carrier concentration MoSe2 compound exhibits metallic behavior < 130 degrees C with a small Seebeck coefficient, which results from metastable IT-MoSe2 structure of the restacked phase