IRG II: Nanoscale Interface Studies @ University of Oklahoma / University of Arkansas
Research Fields: | Nano Focused | Nanostructures / Nanoparticles |
Two-dimensional electron gases (2DEGs) have been studied in III-V heterostructures for over two decades. In 1978, the innovation of modulation doping solved the problem of ionized donor scattering. Further development of molecular beam epitaxy (MBE) technology and refinement of sample design have led to extraordinary low-temperature mobilities in GaAs, on the order of 107cm2/Vs, so that the time for an electron to scatter in such systems is 10,000 times that of an electron in a metal. This extremely low disorder enabled the Nobel Prize winning discovery of the fractional quantum Hall effect and the realization of ballistic transport devices.