Electronic Nanostructures
Miniaturization of electrical devices in high mobility materials enables the exploration of coherent systems in which the electrons behave similar to waves. In the 1980s, we developed the fabrication tools for defining electron waveguides from high-mobility two-dimensional electron gases and measured electron transport through these nanofabricated devices at cryogenic temperatures. One of the observations of some interest was the “quenching” of the Hall effect in these waveguide structures, and this is described in a Physical Review Letters paper. Other nanostructures that were subsequently explored include “anti-dot” arrays that were lithographically defined to observe coherent back-reflection of electrons and peaks in the magneto-resistance at specific magnetic fields.
