Single layers of transition metal dichalcogenides are two-dimensional (2D) direct-bandgap semiconductors with degenerate, but inequivalent, ‘valleys’ in the electronic structure that can be ...

Researchers from the University of Pennsylvania and Montana State University have now introduced a ...

Photovoltaics, the conversion of light to electricity, is a key technology for sustainable energy. Since the days of Max Planck and Albert Einstein, we know that light as well as electricity are ...

Bose-Einstein condensation (BEC) is normally limited to temperatures near absolute zero but researchers have now seen it at a much warmer 100 Kelvin for excitons (electron-hole pairs) in atomically ...

Photonic devices are hardware systems that can process information using light instead of electricity. These systems could ...

Last year, researchers at the École polytechnique fédérale de Lausanne (EPFL) in Switzerland developed a new type of transistor — one based on excitons, a special type of quasiparticle — which could ...

If you read the scientific literature, you see the familiar subatomic particles you learned about in school: protons, neutrons, and electrons. If you are young enough, you see others you probably ...

Physicists develop new systems to trap individual excitons, - bound pairs of electrons and their associated positive charges. Credit: Xiaodong Xu For the first announcement of “magic-angle” bilayer ...

An ultra-short flash of light breaks the bond between the electron (red) and the hole (blue), enabling research on charge-transfer processes in atomically thin semiconductors. Credit: Lukas Kroll, Jan ...

In solar cells and light-emitting diodes, maintaining the excited state kinetics of molecules against annihilation is a race against time. These systems need to strike a careful balance between ...

Solar panels have become more efficient over the years, but even the best designs still lose a large fraction of the energy ...