Directional Interlayer Spin-Valley Transfer in Two-Dimensional Heterostructures
arXiv:1612.04863 · doi:10.1038/ncomms13747
Abstract
Van der Waals heterostructures formed by two different monolayer semiconductors have emerged as a promising platform for new optoelectronic and spin/valleytronic applications. In addition to its atomically thin nature, a two-dimensional semiconductor heterostructure is distinct from its three-dimensional counterparts due to the unique coupled spin-valley physics of its constituent monolayers. Here, we report the direct observation that an optically generated spin-valley polarization in one monolayer can be transferred between layers of a two-dimensional MoSe2-WSe2 heterostructure. Using nondegenerate optical circular dichroism spectroscopy, we show that charge transfer between two monolayers conserves spin-valley polarization and is only weakly dependent on the twist angle between layers. Our work points to a new spin-valley pumping scheme in nanoscale devices, provides a fundamental understanding of spin-valley transfer across the two-dimensional interface, and shows the potential use of two-dimensional semiconductors as a spin-valley generator in 2D spin/valleytronic devices for storing and processing information.
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Cited by in corpus (32)
- Moiré Excitons in Van der Waals Heterostructures
- Signatures of moiré-trapped valley excitons in MoSe/WSe heterobilayers
- Long-lived direct and indirect interlayer excitons in van der Waals heterostructures
- Theory of optical absorption by interlayer excitons in transition metal dichalcogenide heterobilayers
- Enhanced Light-Matter Interaction in Two-Dimensional Transition Metal Dichalcogenides
- Dipolar interactions between field-tuneable, localized emitters in van der Waals heterostructures
- Interlayer exciton dynamics in a dichalcogenide monolayer heterostructure
- Brightened spin-triplet interlayer excitons and optical selection rules in van der Waals heterobilayers
- Epitaxial Growth of 2D Layered Transition Metal Dichalcogenides
- Giant Valley-Zeeman Splitting from Spin-Singlet and Spin-Triplet Interlayer Excitons in WSe2/MoSe2 Heterostructure
- Highly Valley-Polarized Singlet and Triplet Interlayer Excitons in van der Waals Heterostructure
- Observation of Inter-layer Excitons in MoSe2 Single Crystals
- Ultrafast charge-transfer dynamics in twisted MoS/WSe heterostructures
- Opportunities in Electrically Tunable 2D Materials Beyond Graphene: Recent Progress and Future Outlook
- Nanoscale trapping of interlayer excitons in a 2D semiconductor heterostructure
- Second harmonic generation control in twisted bilayers of transition metal dichalcogenides
- Intercell Moiré Exciton Complexes in Electron Lattices
- Interlayer Exciton Diode and Transistor
- Evidence for Exciton Crystals in a 2D Semiconductor Heterotrilayer
- Second-Harmonic Young Interference in Atom-Thin Heterocrystals
- Interfacial bound exciton state in a hybrid structure of monolayer WS2 and InGaN quantum dots
- Spin/valley coupled dynamics of electrons and holes at the interface
- Charge transfer dynamics in MoSe/hBN/WSe heterostructures
- Light-matter interaction in van der Waals heterostructures
- Tuning of impurity-bound interlayer complexes in a van der Waals heterobilayer
- Anomalous Second Harmonic Generation from Atomically Thin MnBi2Te4
- Optical spin pumping induced pseudo-magnetic field in two dimensional heterostructures
- Single exciton trapping in an electrostatically defined 2D semiconductor quantum dot
- Twistronics and moiré superlattice physics in 2D transition metal dichalcogenides
- Enhanced Emission from WSe2 Monolayers Coupled to Circular Bragg Gratings
- Plasmon-Enhanced Interface Charge Transfer Exciton of 2D In-Plane Lateral and van Der Waals MoS/WS Heterostructures
- Localized Interlayer Excitons in MoSe2-WSe2 Heterostructures without a Moiré Potential