Manipulation of Stacking Order in Td-WTe₂ by Ultrafast Optical Excitation.

ABSTRACT: Subtle changes in stacking order of layered transition metal dichalcogenides may have profound influence on the electronic and optical properties. The intriguing electronic properties of Td-WTe₂ can be traced to the break of inversion symmetry resulting from the ground-state stacking sequence. Strategies for perturbation of the stacking order are actively pursued for intentional tuning of material properties, where optical excitation is of specific interest since it holds the potential for integration of ultrafast switches in future device designs. Here we investigate the structural response in Td-WTe₂ following ultrafast photoexcitation by time-resolved electron diffraction. A 0.23 THz shear phonon, involving layer displacement along the b axis,

SUBMITTER: Ji S 

PROVIDER: S-EPMC8291768 | biostudies-literature | 2021 May

REPOSITORIES: biostudies-literature