Author/Authors :
Vasu، نويسنده , , K. and Matte، نويسنده , , H.S.S.R. and Shirodkar، نويسنده , , Sharmila N. and Jayaram، نويسنده , , V. and Reddy، نويسنده , , K.P.J. and Waghmare، نويسنده , , Umesh V. and Rao، نويسنده , , C.N.R.، نويسنده ,
Abstract :
Exposure of few-layer MoS2, WS2 and MoSe2 to high-temperature shock waves causes morphological changes and a significant decrease in the interlayer separation between the (0 0 2) planes, the decrease being greatest in MoSe2. Raman spectra show softening of both the A 1 g and the E 2 g 1 modes initially, followed by a slightly stiffening. Using first-principles density functional theoretical analysis of the response of few-layer MoS2 to shock waves, we propose that a combination of shear and uniaxial compressive deformation leads to flattening of MoS2 sheets which is responsible for the changes in the vibrational spectra.
