Fabricating a Twisted Bilayer WSe2 Device

The distinct properties of the quantum confinement effects in two-dimensional materials from that of bulk three-dimensional materials have led to enormous research attention in 2D materials. Since 2D materials are uniform and have a fixed and thin thickness, confinement effects are observed. Due to this, combining different 2D crystals held by van der Waals forces can be made into one vertical stack known as the Vander Waals heterostructure. Stacking one monolayer over another has opened up new paths to band engineering. Fabricating a twisted bilayer transition metal dichalcogenides (TMDs) device is the foundation of this experiment. Two-dimensional transition metal dichalcogenides (TMDs) moire systems, specifically twisted bilayer tungsten diselenide (tWSe2) exhibit exceptional tunability bandstructure properties enabling the exploration of more quantum effects. Recent experiments in graphene-based heterostructures using tuning parameters such as twist angle, pressure, and layer stacking have proven superconductivity. Although these parameters have also been investigated in moireTMD systems, applying pressure to prove superconductivity and other phenomena has rarely been studied. In this project, we fabricated a twisted bilayer tungsten diselenide (tWSe2) and used it in an ongoing project that deals with correlations under pressure.