WebMoiré superlattices in van der Waals (vdW) heterostructures form by stacking atomically thin layers on top of one another with a twist angle or lattice mismatch. The resulting moiré potential leads to a strong modification of the band structure, which can give rise to exotic quantum phenomena ranging from correlated insulators and superconductors to moiré … WebHere, we report fabrication and comprehensive characterizations of WSe 2 /WS 2 bilayer heterojunctions with various twist angles that were synthesized by artificially stacking monolayers of WS 2 and WSe 2 grown by chemical vapor deposition. ... Probing Evolution of Twist-Angle-Dependent Interlayer Excitons in MoSe2/WSe2 van der Waals ...
Dynamic control of moiré potential in twisted WS2—WSe2
WebThe cavity energy is twist-angle independent (flat blue line) and tuned to the untwisted exciton energy of 1.65 eV ( L = λ/2 = 374 nm). In contrast, the moiré exciton energies have a clear twist-angle dependence, cf. Figure 4 a. In particular, the exciton shifts by 14 meV as the twist angle is tuned from 0.5° to 3°. WebOct 20, 2024 · A twist-angle dependent exciton resulted from interlayer coupling between monolayer WS2 and WSe2, is an intralayer exciton with its transition dipole moment almost parallel to the atomic plane. heart on sleeve origin
Identification of twist-angle-dependent excitons in WS2/WSe2 ...
WebMay 28, 2024 · Specifically, we observe that the interlayer excitons in twisted WSe2/WSe2 bilayers exhibit a high (>60%) degree of circular polarization (DOCP) and long valley lifetimes (>40 ns) at zero electric ... WebJun 22, 2024 · Tunable correlated states are observed in twist bilayer WSe2 over a range ... V. I. Interlayer hybridization and moiré superlattice minibands for electrons and excitons … WebHowever, our understanding of the motion of excitons in moiré potentials is still limited. ... We found that the exciton motion is modulated by twist-angle-dependent moiré potentials … heart on sleeve tattoo