Moiré materials have emerged as a platform for exploring the physics of strong electronic
correlations and non-trivial band topology. Here we review the recent progress in …

Atomically thin transition metal dichalcogenides (TMDs) are 2D semiconductors with tightly
bound excitons and correspondingly strong light–matter interactions. Owing to the weak van …

A Bose–Einstein condensate is the ground state of a dilute gas of bosons, such as atoms
cooled to temperatures close to absolute zero. With much smaller mass, excitons (bound …

Excitonic insulators (EIs) arise from the formation of bound electron–hole pairs (excitons), in
semiconductors and provide a solid-state platform for quantum many-boson physics …

Excitonic insulators (EIs), arising in semiconductors when the electron-hole binding energy
exceeds the band gap, are a solid-state prototype for bosonic phases of matter. Unlike the …

Recent experiments have realized steady-state electrical injection of interlayer excitons in
electron-hole bilayers subject to a large bias voltage. In the ideal case in which interlayer …

Bilayers consisting of two-dimensional (2D) electron and hole gases separated by a 10 nm
thick AlGaAs barrier are formed by charge accumulation in epitaxially grown GaAs. Both …

Moiré superlattices based on two-dimensional transition metal dichalcogenides (TMDs)
have emerged as a highly versatile and fruitful platform for exploring correlated topological …

Stacking single layers of atoms on top of each other provides a fundamental way to achieve
novel material systems and engineer their physical properties, which offers opportunities for …

We study the electronic properties of dual-gated electron-hole bilayers in which the two
layers are separated by a perfectly opaque tunnel barrier. Combining an electrostatic and …