Valley-selective optical Stark effect in monolayer WS2
arXiv:1407.1825 · doi:10.1038/nmat4156
Abstract
Breaking space-time symmetries in two-dimensional crystals (2D) can dramatically influence their macroscopic electronic properties. Monolayer transition-metal dichalcogenides (TMDs) are prime examples where the intrinsically broken crystal inversion symmetry permits the generation of valley-selective electron populations, even though the two valleys are energetically degenerate, locked by time-reversal symmetry. Lifting the valley degeneracy in these materials is of great interest because it would allow for valley-specific band engineering and offer additional control in valleytronic applications. While applying a magnetic field should in principle accomplish this task, experiments to date have observed no valley-selective energy level shifts in fields accessible in the laboratory. Here we show the first direct evidence of lifted valley degeneracy in the monolayer TMD WS2. By applying intense circularly polarized light, which breaks time-reversal symmetry, we demonstrate that the exciton level in each valley can be selectively tuned by as much as 18 meV via the optical Stark effect. These results offer a novel way to control valley degree of freedom, and may provide a means to realize new valley-selective Floquet topological phases in 2D TMDs.
References in corpus (9)
- Quantum Spin Hall Effect and Topological Phase Transition in HgTe Quantum Wells
- Valley polarization in MoS2 monolayers by optical pumping
- Synthesis of Large-Area MoS2 Atomic Layers with Chemical Vapor Deposition
- Strong light-matter coupling in two-dimensional atomic crystals
- Magnetic Control of Valley Pseudospin in Monolayer WSe2
- Valley Zeeman Effect in Elementary Optical Excitations of a Monolayer WSe2
- Photoinduced transition between conventional and topological insulators in two-dimensional electronic systems
- Temperature Dependent Valley Relaxation Dynamics in Single Layer WS2 Measured Using Ultrafast Spectroscopy
- Dynamic Stark Effect in Strongly Coupled Microcavity Exciton-Polaritons
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- Excitons in atomically thin transition metal dichalcogenides
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