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Layer-dependent ferromagnetism in a van der Waals crystal down to the monolayer limit
Since the discovery of graphene, the family of two-dimensional materials has grown, displaying a broad range of electronic properties. Recent additions include semiconductors with spin–valley
Single quantum emitters in monolayer semiconductors.
A new class of SQEs based on excitons that are spatially localized by defects in 2D tungsten-diselenide (WSe2) monolayers is reported, which could give rise to practical advantages in quantum-information processing, such as an efficient photon extraction and a high integratability and scalability.
Valleytronics in 2D materials
The energy extrema of an electronic band are referred to as valleys. In 2D materials, two distinguishable valleys can be used to encode information and explore other valleytronic applications.
Observation of long-lived interlayer excitons in monolayer MoSe2-WSe2 heterostructures.
This work demonstrates optical pumping of interlayer electric polarization, which may provoke further exploration of inter layer exciton condensation, as well as new applications in two-dimensional lasers, light-emitting diodes and photovoltaic devices.
Atomically Thin CrCl3: An In-Plane Layered Antiferromagnetic Insulator.
It is demonstrated that atomically thin CrCl3 is a layered antiferromagnetic insulator with an easy-plane normal to the c-axis, that is, the polarization is in the plane of each layer and has no preferred direction within it.
Electrical control of 2D magnetism in bilayer CrI3
Electrical control of magnetism in a bilayer of CrI3 enables the realization of an electrically driven magnetic phase transition and the observation of the magneto-optical Kerr effect in 2D magnets.
Probing the Influence of Dielectric Environment on Excitons in Monolayer WSe2: Insight from High Magnetic Fields.
The systematic increase of the exciton's size with dielectric screening, and concurrent reduction in binding energy (also inferred from these measurements), is quantitatively compared with leading theoretical models, and demonstrates how exciton properties can be tuned in future 2D optoelectronic devices.
Nanocavity Integrated van der Waals Heterostructure Light-Emitting Tunneling Diode.
This work shows that cavity integrated vdWhs present a promising nanoscale optoelectronic platform and demonstrates direct modulation of this single mode electroluminescence at a speed of ∼1 MHz, which is faster than most of the planaroptoelectronics based on transition metal chalcogenides (TMDCs).
Magnetic Behavior and Spin-Lattice Coupling in Cleavable, van der Waals Layered CrCl3 Crystals
CrCl3 is a layered insulator that undergoes a crystallographic phase transition below room temperature and orders antiferromagnetically at low temperature. Weak van der Waals bonding between the
Giant nonreciprocal second-harmonic generation from antiferromagnetic bilayer CrI3
Large second-harmonic generation is observed in antiferromagnetic bilayers of CrI3, providing information about the microscopic origin of layered antiferROMagnetism and motivating the use of two-dimensional magnets in nonlinear optical devices.