Two-dimensional (2D) materials and their corresponding van der Waals heterostructures have drawn tremendous interest due to their extraordinary electrical and optoelectronic properties. Insulating 2D hexagonal boron nitride (h-BN) with an atomically smooth surface has been widely used as a passivation layer to improve carrier transport for other 2D materials, especially for Transition Metal Dic...

Citation Ribeiro-Soares, J., et al. "Group theory analysis of phonons in two-dimensional transition metal dichalcogenides. Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. The MIT Faculty has made this article openly available. Please share how this access benefits you. Your story m...

Abstract Layered transition metal dichalcogenides (TMDCs) have shown great potential for a wide range of applications in photonics and optoelectronics. Nevertheless, valley decoherence severely randomizes its polarization which is important to light emitter. Plasmonic metasurface with unique way manipulate the light-matter interaction may provide an effective practical solution. Here by integra...

In transition metal dichalcogenides (TMDCs), charge carriers have spin, pseudospin, and valley degrees of freedom associated with magnetic moments. The monolayers bilayers the TMDCs, in particular, MoS2, lead to strong couplings between spin pseudospin effects. This feature has drawn attention TMDCs for their potential use advanced tech devices. Meanwhile, high-order harmonic generation (HHG) r...

Contact engineering for monolayered transition metal dichalcogenides (TMDCs) is considered to be of fundamental challenge realizing high-performance TMDCs-based (opto) electronic devices. Here, an innovative concept established a device configuration with metallic copper monosulfide (CuS) electrodes that induces sulfur vacancy healing in the monolayer molybdenum disulfide (MoS2) channel. Excess...

Spin regulation and manipulation in two-dimensional transition-metal dichalcogenides (TMDCs) is of great significance for spintronics. The electronic structure spin feature WSe2/SrIrO3(111) WSSe/SrIrO3(111) interfaces were investigated by first-principles calculations with spin–orbital coupling, which various effective stacking configurations considered. spin-splitting WSe2 at K point the Brill...

Abstract Tightly bound dark excitons in atomically thin semiconductors can be used for various optoelectronic applications including light storage and quantum communication. Their optical accessibility is however limited due to their out-of-plane transition dipole moment. We thus propose strengthen the coupling of two dimensional materials with resonant modes a cavity at room temperature, by en...

Understanding the exciton many-body interactions and their recombination dynamics in transition metal dichalcogenides (TMDCs) are important for potential applications optoelectronics valleytronics. Herein, using ultrafast non-degenerate transient differential reflectance spectroscopy, we studied WS2 single crystal. Spectrally temporally resolved studies revealed strong interrelated excitonic of...

We theoretically study the interaction of an ultrafast intense linearly polarized optical pulse with monolayers transition metal dichalcogenides (TMDCs). Such a strong redistributes electrons between bands and generates femtosecond currents during pulse. Due to large bandwidth incident pulse, this process is completely off-resonant. While in TMDCs time-reversal symmetry conserved, inversion bro...