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Moire Superlattices

All articles tagged with #moire superlattices

"Groundbreaking Discovery: Rydberg Moiré Excitons Unveiled by Scientists"
science-and-technology2 years ago

"Groundbreaking Discovery: Rydberg Moiré Excitons Unveiled by Scientists"

Scientists have discovered Rydberg moiré excitons, which are highly excited Coulomb-bound states of electron-hole pairs trapped in a monolayer semiconductor adjacent to small-angle twisted bilayer graphene. The researchers used low-temperature optical spectroscopy measurements to observe the Rydberg moiré excitons and demonstrated a novel method of manipulating them. This discovery holds promise for applications in sensing, quantum optics, and quantum simulation, and may provide new opportunities for realizing Rydberg-Rydberg interactions and coherent control of Rydberg states in quantum information processing and quantum computation.

Harnessing the Power of Moiré Superlattices in Photonics and Optoelectronics
science-and-technology3 years ago

Harnessing the Power of Moiré Superlattices in Photonics and Optoelectronics

Researchers from the Institute of Physics of the Chinese Academy of Sciences have published an overview of recent progress in emerging moiré photonics and optoelectronics. Moiré superlattices are artificial quantum materials formed by stacking two or more 2D layered materials with a slight lattice mismatch and/or a small rotational twist. They introduce a potential landscape of much larger length scale than the crystal periodicity of the constituent 2D layers, providing a novel paradigm for engineering band structures and hence a plethora of exotic quantum phenomena. Moiré superlattices offer a powerful strategy for engineering excitonic quasiparticles in both real and momentum spaces, giving rise to quantum-dot-like moiré excitons and Bragg-umklapp moiré excitons, respectively.