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Semiconductors are materials that have a small electronic bandgap. This bandgap prevents current from flowing at absolute zero, but thermally excited charge carriers can begin to flow at higher temperatures. Semiconductors, notably silicon, are at the heart of the modern microelectronics industry, and also have applications in light sources and detectors.
2D semiconductors may offer a platform for future electronics, but the wafer-scale fabrication of high-performance 2D transistors remains challenging. Here, the authors report a universal all-stacking method to fabricate wafer-scale 2D electronic devices with van der Waals contacts, based on epitaxial metallic electrodes grown on fluorophlogopite mica.
The authors reveal a link between the quantum metric and the dielectric constant of insulators, determining the geometric capacitance of insulators and revealing the intrinsic delocalization of electrons in the lattice.
Discovering improved semiconductor materials is essential for optimal device fabrication. In this Perspective, data-driven computational frameworks for semiconductor discovery and device development are discussed, including the challenges and opportunities moving forward.
Here, the authors discover the ground and excited state interlayer excitons in bi- and tri-layer 2H-MoSe2 crystals which exhibit electric-field-driven hybridisation with the intralayer A excitons, showing distinct spin, layer and valley characteristics.
90 years after Eugene Wigner predicted the formation of an ordered electron state, direct observations of a lattice of electrons in bilayer graphene not only verify the existence of a Wigner crystal but find unexpected physics.
Two-dimensional crystals have revolutionized fundamental research across a staggering range of disciplines. We take stock of the progress gained after twenty years of work.
The integration of high-performance n-type and p-type two-dimensional transistors — which can be fabricated on 300 mm wafers using a die-by-die transfer process — is an important step in the lab-to-fab transition of two-dimensional semiconductors.