Devices that can automatically detect and recognize moving objects have numerous valuable applications, for instance, enhancing remote environmental monitoring. Most existing motion detection and recognition (MDR) technologies are based on image sensors made of...
Nanotechnology
The observation of correlated states and superconductivity in twisted trilayer graphene
When two layers of graphene or of other two-dimensional (2D) materials are stacked on top of each other with a small angle misalignment, the crystal lattices produced by each layer are spatially 'out of synch'. This results in a unique structural pattern known as...
Researchers observe interband collective excitations in twisted bilayer graphene
Twisted bilayer graphene is a carbon-based, two-dimensional (2D) material comprising two graphene layers. Although many scientists have recently started exploring its potential for superconductivity and magnetism, so far, there have been very few optical studies...
Researchers observe moiré trions in H-stacked transition metal dichalcogenide bilayers
In physics, the moiré pattern is a specific geometrical design in which sets of straight or curved lines are superposed on top of each other. Recent studies have found that bilayers of transition metal dichalcogenide materials arranged in moiré patterns could be...
A technique to create sub-10-nm graphene nanoribbons from squashed carbon nanotubes
Graphene nanoribbons (GNRs) are narrow and long strips of graphene with widths below 100 nm. GNRs that have smooth edges, a sizable bandgap and high charge carrier mobility could be highly valuable for a wide range of electronic and optoelectronic applications. So...
Researchers achieve charge-order-enhanced capacitance in semiconductor moiré superlattices
In recent years, electronics engineers have been experimenting with new materials that could be used to study electronic correlation phenomena. Van der Waals (vdW) moiré materials are particularly promising for examining these phenomena. VdW materials are composed of...
Researchers observe two-fold symmetric superconductivity in 2D niobium diselenide
In recent years, many material scientists worldwide have been investigating the potential of two-dimensional (2D) materials, which are composed of a single layer or a few ultrathin layers of atoms and have unique physical, electrical and optical properties.
A technique to over-dope graphene beyond the van Hove singularity
For over a decade, theoretical physicists have predicted that the van Hove singularity of graphene could be associated with different exotic phases of matter, the most notable of which is chiral superconductivity.
Study examines spontaneous symmetry breaking in twisted double bilayer graphene
Over the past few years, a growing number of researchers worldwide has been conducting studies investigating the properties and features of so-called twisted van der Waals (vdW) materials. This unique class of materials could be an ideal platform to examine correlated...
Nanoscale imaging of dopant nanostructures in silicon-based devices
When fabricating integrated circuits and different types of silicon-based devices, researchers need to position dopant nanostructures in specific ways with high levels of precision. However, arranging these structures at the nanometer scale can be challenging, as...