Strain engineering and lattice vibration manipulation of atomically thin TaS₂ films.

ABSTRACT: Beside the extraordinary structural, mechanical and physical properties of two-dimensional (2D) materials, the capability to tune properties via strain engineering has shown great potential for nano-electromechanical systems. External strain, in a controlled manner, can manipulate the optical and electronic properties of the 2D materials. We observed the lattice vibration modulation in strained mono- and few-layer tantalum sulfide (TaS₂). Two Raman modes, E_1g and E¹ _2g, exhibit sensitive strain dependence, with the frequency of the former intensity increasing and the latter decreasing under a compressive strain. The opposite direction of the intensity shifts, which cannot be explained solely by van der Waals interlayer coupling, is attribu

SUBMITTER: Wu X 

PROVIDER: S-EPMC9053043 | biostudies-literature | 2020 Apr

REPOSITORIES: biostudies-literature