Nanophysics: Slight Twist Provides Fascinating Effects on Two Layers nanophysics nanotechnology nano
Mar 29 2023Reviewed by Skyla Baily Superconductivity, for instance, could be present in bilayers of the wonder material graphene that have been twisted by the magic angle of 1.1°.
The combination of materials, the number of layers, and their relative orientation give rise to a wide variety of novel phenomena. In the lab, we can tailor physical phenomena for various applications in electronics, photonics, or quantum technology with properties that are unknown in naturally occurring crystals. But as a recent study published in the journal Nature Nanotechnology shows, it is not always simple to understand the events that are observed during experiments.
According to Högele, moiré interference has a significant influence on the characteristics of the composite system and also on electrons and tightly bonded electron-hole pairs, or excitons, in the quantum mechanical realm of atomically thin crystal heterostructures. Ideal moiré patterns are believed to be transformed into periodic patterns with triangular or hexagonal tiling in the latter scenario.
“We also observe collective phenomena in synthetic crystals, where periodic moiré patterns have a dramatic effect on the motion of electrons as well as their mutual interactions,” Högele stated. “Excitons thus act as mediators of light-matter interaction in semiconductor crystals,” Högele further stated.
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