Ultrafast Science / 2022 / Article / Fig 11

Review Article

Theoretical Insights into Ultrafast Dynamics in Quantum Materials

Figure 11

Polarization-anisotropic response of interlayer shear displacements and the induced topological phase transitions. (a) Top and side views of lattice structure of Td-WTe2. (b, c) Interlayer shear displacements when the laser polarization is along the -axis and -axis (LP-a and LP-b excitation). The corresponding shear modes are shown in the inset of each panel. (d, e) Schematic illustration of the potential energy surface before (black line) and after (red line) the photoexcitation, and time evolution of Weyl points under two excitation conditions.