Physicists create five-lane superhighway for electrons
phys.org
phys.org
> Electron-phonon coupling is lying at the heart of many condensed matter phenomena. The van der Waals stacking of two-dimensional materials and the twisting-angle-controlled Moire superlattice offer new opportunities for studying and engineering interlayer electron-phonon coupling. I will present our infrared spectroscopy study of several graphene-based Moire superlattices, showing strong features of interlayer electron-phonon coupling. This coupling can be further tuned through controlling the Moire wavelength and gate electric fields.
Is this potentially relevant to solving for ancient Geopolymer methods with electricity and possibly acoustic notes and/or chords?
Anyways, the original exercise:
"A scattering-type scanning nearfield optical microscope probes materials at the nanoscale" (2021) https://phys.org/news/2021-07-scattering-type-scanning-nearf... :
> The new tool is based on atomic force microscopy (AFM), in which an extremely sharp metallic tip with a radius of only 20 nanometers, or billionths of a meter, is scanned across the surface of a material. AFM creates a map of the physical features, or topography, of a surface, of such high resolution that it can identify "mountains" or "valleys" less than a nanometer in height or depth.
> Ju is adding light to the equation. Focusing an infrared laser on the AFM tip turns that tip into an antenna "just like the antenna on a television that's used to receive signals," he says. And that, in turn, greatly enhances interactions between the light and the material beneath the tip. The back-scattered light collected from those interactions can be analyzed to reveal much more about the surface than would be possible with a conventional AFM.
"Correlated insulator and Chern insulators in pentalayer rhombohedral-stacked graphene" (2023) https://www.nature.com/articles/s41565-023-01520-1 :
> [...] Our results establish rhombohedral multilayer graphene as a suitable system for exploring intertwined electron correlation and topology phenomena in natural graphitic materials without the need for moiré superlattice engineering.
"Fractional quantum anomalous hall effect in a graphene moire superlattice" (2023)
"Fractional quantum anomalous Hall effect in multilayer graphene" (2024)
"Electron correlation and topology in rhombohedral multilayer graphene" (2024)
"Large quantum anomalous Hall effect in spin-orbit proximitized rhombohedral graphene" (2024) https://www.science.org/doi/10.1126/science.adk9749