Vortex washboard voltage noise in type-II superconductors

dc.contributor.authorBullard, Thomas J. IIIen
dc.contributor.authorDas, Jayajiten
dc.contributor.authorDaquila, George L.en
dc.contributor.authorTäuber, Uwe C.en
dc.contributor.departmentPhysicsen
dc.date.accessioned2016-09-30T13:12:09Zen
dc.date.available2016-09-30T13:12:09Zen
dc.date.issued2008-10-01en
dc.description.abstractIn order to characterize flux flow through disordered type-II superconductors, we investigate the effects of columnar and point defects on the vortex velocity / voltage power spectrum in the driven non-equilibrium steady state. We employ three-dimensional Metropolis Monte Carlo simulations to measure relevant physical observables including the force-velocity / current-voltage (I-V) characteristics, vortex spatial arrangement and structure factor, and mean flux line radius of gyration. Our simulation results compare well to earlier findings and physical intuition. We focus specifically on the voltage noise power spectra in conjunction with the vortex structure factor in the presence of weak columnar and point pinning centers. We investigate the vortex washboard noise peak and associated higher harmonics, and show that the intensity ratios of the washboard harmonics are determined by the strength of the material defects rather than the type of pins present. Through varying columnar defect lengths and pinning strengths as well as magnetic flux density we further explore the effect of the material defects on vortex transport. It is demonstrated that the radius of gyration displays quantitatively unique features that depend characteristically on the type of material defects present in the sample.en
dc.description.versionPublished versionen
dc.format.extent469 - 484 (16) page(s)en
dc.identifier.doihttps://doi.org/10.1140/epjb/e2008-00358-7en
dc.identifier.issn1434-6028en
dc.identifier.issue4en
dc.identifier.urihttp://hdl.handle.net/10919/73116en
dc.identifier.volume65en
dc.languageEnglishen
dc.publisherSpringeren
dc.relation.urihttp://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000260770900001&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=930d57c9ac61a043676db62af60056c1en
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectPhysics, Condensed Matteren
dc.subjectPhysicsen
dc.subjectHIGH-TEMPERATURE SUPERCONDUCTORSen
dc.subjectBOSON LOCALIZATIONen
dc.subjectDRIVEN LATTICESen
dc.subjectMAGNETIC-FLUXen
dc.subjectGLASSen
dc.subjectPHASEen
dc.subjectINTERFERENCEen
dc.subjectTRANSITIONSen
dc.subjectSIMULATIONen
dc.subjectVORTICESen
dc.titleVortex washboard voltage noise in type-II superconductorsen
dc.title.serialEUROPEAN PHYSICAL JOURNAL Ben
dc.typeArticle - Refereeden
pubs.organisational-group/Virginia Techen
pubs.organisational-group/Virginia Tech/All T&R Facultyen
pubs.organisational-group/Virginia Tech/Scienceen
pubs.organisational-group/Virginia Tech/Science/COS T&R Facultyen
pubs.organisational-group/Virginia Tech/Science/Physicsen
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