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Files | Description | Format |
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application/pdf ![]() ![]() | 2005_Bollinger_Anthony |
Description
Title: | Superconductor-insulator transition in quasi-one-dimensional nanowires |
Author(s): | Bollinger, Anthony Travis |
Director of Research: | Bezryadin, Alexey |
Department / Program: | Physics |
Discipline: | Physics |
Degree: | Ph.D. |
Genre: | Dissertation |
Subject(s): | Molybdenum Germanium (MoGe)
superconducting nanowires superconductor insulator transition superconductivity Langer, Ambegaokar, McCumber and Halperin (LAMH) theory |
Abstract: | We have studied a large group of superconducting MoGe nanowires fabricated by a molecular templating technique. A well-defined superconductor-insulator transition (SIT) is observed in homogeneous wires with lengths less than ~200 nm. The total normal state resistance of the wire is found to be the control parameter for this transition with the critical point occurring near the quantum of resistance for Cooper pairs. Wires in the superconducting phase of the SIT are well described by the Langer-Ambegaokar-McCumber-Halperin theory of thermally activated phase slips. No resistance “tails” characteristic of quantum phase slips were observed. Wires in the insulating phase of the SIT follow the predictions of the theory of weak Coulomb blockade in a diffusive normal metal. Longer wires display signs of a “mixed” behavior that is similar to that found for inhomogeneous wires in which a single wire acts as a combination of two or more superconducting and/or insulating sections. |
Issue Date: | 2005-10 |
Genre: | Dissertation / Thesis |
Type: | Text |
Language: | English |
URI: | http://hdl.handle.net/2142/32092 |
Rights Information: | © 2005 Anthony Travis Bollinger |
Date Available in IDEALS: | 2012-06-29 |
Identifier in Online Catalog: | 5187923 |
This item appears in the following Collection(s)
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Dissertations and Theses - Physics
Dissertations in Physics -
Graduate Dissertations and Theses at Illinois
Graduate Theses and Dissertations at Illinois