Electron flow (A130/0064) Mug

Electron flow. Computer model representing the flow of electrons through a two-dimensional electron gas (2DEG). The 'gas' is composed of many free electrons, which can move around in only one plane. The 2DEG possesses an electric potential. Irregularities in this potential produce a 'bumpy' surface. The model shows the paths taken by electrons released one at a time into the gas. The negatively-charged electrons were deflected by the bumps in the gas, producing a branching pattern, with the greatest density of electrons represented by the darkest areas. The electron flow was modelled by Professor Eric Heller, Harvard University, Cambridge, Massachusetts, USA.