Magnetotransport in two-dimensional electron gases on cylindrical surfaces

摘要

We have fabricated high-mobility, two-dimensional electron gases in a GaAsquantum well on cylindrical surfaces, which allows to investigate themagnetotransport behavior under varying magnetic fields along the current path.A strong asymmetry in the quantum Hall effect appears for measurements on bothsides of the conductive path. We determined the strain at the position of thequantum well. We observe ballistic transport in 8-micrometers-wide collimatingstructures.