Quantum Devices

Abstract

The NW structure is highly anisotropic with radial dimensions confined by the diameters to <100 nm and axial lengths >1000 nm, although the axial device dimension can be confined during synthesis, for example by modulation doping, or by device fabrication. When the confined dimensions of the NWs become comparable to the electron wavelength, the fundamental quantum properties of charge carriers dominate the charge transport and new device properties become possible. In this chapter, we introduce studies over the past decade where quantum properties are critical to the observed behavior, including quantum dot systems in semiconductor NWs, hybrid superconductor-semiconductor NW devices, and NW topological insulators.