About cookies on this site Our websites require some cookies to function properly (required). In addition, other cookies may be used with your consent to analyze site usage, improve the user experience and for advertising. For more information, please review your options. By visiting our website, you agree to our processing of information as described in IBM’sprivacy statement. To provide a smooth navigation, your cookie preferences will be shared across the IBM web domains listed here.
Publication
Surface Science
Paper
Quantized conductance of a quasi-ballistic one-dimensional wire
Abstract
We have measured the conductance quantization of a single, ungated and quasi-ballistic GaAlAs/GaAs heterojunction wire using the time decay of the photoconductivity. At temperatures 1.7-4.2 K we observed well resolved conductance plateaux with step heights ΔG ≈ 0.25 × (2e2 h). For T = 0.35 K the conductance quantization is obscured by fully developed universa conductance fluctuations. An increase of the step height to 2e2 h with magnetic field is also observed. The data are compared with existing theories of transport in weakly disordered quasi-one-dimensional wires. © 1992.