Raman tensor of layered MoS2

Raman tensors, one of the basic physical properties of MoS2, are rarely reported. Here, angle-resolved polarized Raman scatterings on basal and cross planes of layered MoS2 were carried out using the geometry configuration of parallel polarization, and the Raman tensors of three optical vibration modes were systematically studied. As a polar vibration mode, the differential polarizability of the A1g mode corresponding to the Raman tensor along the ð' direction is larger than that along the ð'Ž direction. In addition, it is also larger than that formed by E2g and E1g modes. All the experimental results above are beneficial to the understanding of inelastic light-scattering process of MoS2.