Print Email Facebook Twitter Carbon nanotube-based superconducting and ferromagnetic hybrid systems Title Carbon nanotube-based superconducting and ferromagnetic hybrid systems Author Man, H.T. Contributor Klapwijk, T.M. (promotor) Morpurgo, A.F. (promotor) Faculty Applied Sciences Date 2006-09-12 Abstract Carbon Nanotubes are molecules with exceptional physical properties that are most useful for applications in the growing field of nanotechnology. In addition, because of its special electrical properties, they are extremely useful for experiments on the fundamental properties of one-dimensional electronic systems. This thesis describes a series of experiments and a short numerical study aimed at a further understanding of the low-temperature electrical transport of single-walled carbon nanotubes. In this work we perform the first experimental study on the effect of quantum interference in single-wall nanotubes in the presence of disorder, leading to the observation of a weak localization effect and conductance fluctuations. Shifting the focus to systems with superconducting or ferromagnetic contacts, we first propose a phenomenological model to describe the experimental results from a former study with superconducting contacts. We also contact single-wall nanotubes with the large-gap superconductor NbTiN to study the rich interplay between Coulomb blockade, level quantization and superconductivity. And finally, the experimental study of nanotubes with highly transparent ferromagnetic contacts shows that the spin-dependent magnetoresistance is due to quantum interference. Subject carbon nanotubeweak localizationuniversal conductance fluctuationandreev reflectionelectron-electron interactionsuperconductorspin transport To reference this document use: http://resolver.tudelft.nl/uuid:1cb28f63-d54e-46d0-bd49-d7d87e87083b ISBN 978-90-8593-015-0 Part of collection Institutional Repository Document type doctoral thesis Rights (c) 2006 H.T. Man Files PDF as_man_20060912.pdf 7.33 MB Close viewer /islandora/object/uuid:1cb28f63-d54e-46d0-bd49-d7d87e87083b/datastream/OBJ/view