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Vortex phases in type-I superconductors

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dc.contributor.authorSweeney, Mark Charles, author
dc.contributor.authorGelfand, Martin Paul, advisor
dc.contributor.authorMueller, Jennifer L., committee member
dc.contributor.authorBradley, Richard M., committee member
dc.contributor.authorField, Stuart B., committee member
dc.date.accessioned2007-01-03T04:52:18Z
dc.date.available2007-01-03T04:52:18Z
dc.date.issued2010
dc.description.abstractSufficiently thin films of type-I superconductor in a perpendicular magnetic field exhibit a triangular vortex lattice, while thick films develop an intermediate state. To elucidate what happens between these two regimes, precise numerical calculations have been made within Ginzburg-Landau theory at κ=0.5 and 0.25 for a variety of vortex lattice structures with one flux quantum per unit cell. The phase diagram in the space of mean induction and film thickness includes a narrow wedge in which a square lattice is stable, surrounded by the domain of stability of the triangular lattice at thinner films/lower fields and, on the other side, rectangular lattices with continuously varying aspect ratio. The vortex lattice has an anomalously small shear modulus within and close to the square lattice phase. Solutions of the Ginzburg-Landau equations have also been obtained for bulk systems and thin films for vortex lattices with one vortex but two flux quanta per square or triangular unit cell. These lattices of double fluxoid vortices are thermodynamically unstable in bulk in both type-I and type-II superconductors, as expected. In type-I films the situation is less clear, because the corresponding calculations for more complicated vortex lattice structures are not yet possible.
dc.format.mediumborn digital
dc.format.mediumdoctoral dissertations
dc.identifierSweeney_colostate_0053A_10120.pdf
dc.identifierETDF2010100007PHYS
dc.identifier.urihttp://hdl.handle.net/10217/44985
dc.languageEnglish
dc.language.isoeng
dc.publisherColorado State University. Libraries
dc.relation.ispartof2000-2019
dc.rightsCopyright and other restrictions may apply. User is responsible for compliance with all applicable laws. For information about copyright law, please see https://libguides.colostate.edu/copyright.
dc.subjectsuperconductors
dc.subjectVortex-motion
dc.subjectThin films
dc.subjectSuperconductivity
dc.subjectSuperconductors -- Magnetic fields
dc.titleVortex phases in type-I superconductors
dc.typeText
dcterms.rights.dplaThis Item is protected by copyright and/or related rights (https://rightsstatements.org/vocab/InC/1.0/). You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s).
thesis.degree.disciplinePhysics
thesis.degree.grantorColorado State University
thesis.degree.levelDoctoral
thesis.degree.nameDoctor of Philosophy (Ph.D.)

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