The excitation of a material with high-energy photons can produce what is known as an electron-hole plasma. This state is ...

Indeed, electron–hole asymmetry is one of the key recurring features in the phase diagrams of many quantum materials, including cuprate superconductors, twisted graphene sheets, and other ...

Through their experiments, the team discovered that the states of the individual electrons and holes in one of the graphene layers are almost perfectly mirrored in the pair found in the other layer.

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 ...