Pasqual Rivera

TL;DR: In this article, the latest advances in valley-tronics have largely been enabled by the isolation of 2D materials (such as graphene and semiconducting transition metal dichalcogenides) that host an easily accessible electronic valley degree of freedom, allowing for dynamic control.

TL;DR: 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.

TL;DR: It is demonstrated that seamless high-quality in-plane heterojunctions can be grown between the 2D monolayer semiconductors MoSe2 and WSe2, and their structure is an undistorted honeycomb lattice in which substitution of one transition metal by another occurs across the interface.

TL;DR: Results suggest that the origin of the observed effects is interlayer excitons trapped in a smooth moiré potential with inherited valley-contrasting physics, and presents opportunities to control two-dimensional moirÉ optics through variation of the twist angle.

TL;DR: This work created interlayer exciton spin-valley polarization by means of circularly polarized optical pumping and determined a valley lifetime of 40 nanoseconds, which enables the visualization of the expansion of a valley-polarized exciton cloud over several micrometers.