ISSN Online: 2688-7231
ISBN Online: 978-1-56700-524-0
Proceedings of the 26thNational and 4th International ISHMT-ASTFE Heat and Mass Transfer Conference December 17-20, 2021, IIT Madras, Chennai-600036, Tamil Nadu, India
Thermal transport in MoS2 and 2-D Black Phosphorous
要約
The two-dimensional MoS2 and 2-D black phosphorous
(BP) have attracted the attention of researchers for their
excellent physical properties, mainly due to their large
bandgap. This study investigates the thermal properties of
pristine and strained zigzag and armchair MoS2 and BP. The thermal transport is observed to be highly anisotropic
in BP, while the anisotropy is absent in MoS2. The thermal conductivity of the BP increases monotonically while that of the MoS2 decreases. The phonon group velocity, the relaxation time and change in the lattice structure are calculated to delineate the effect of strain in BP and MoS2. The dispersion of the out-of-plane acoustic phonons tend to linearize under strain, whereas the in-plane phonons are softened. The in-plane acoustic phonons are found to be the dominant heat carriers in both pristine and strained MoS2 and BP, although the contribution by the out-ofplane acoustic mode increases under strain. These results are helpful in designing materials for various nanoscale applications.