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dc.creatorMargaris I., Paltoglou V., Flytzanis N.en
dc.date.accessioned2023-01-31T08:57:19Z
dc.date.available2023-01-31T08:57:19Z
dc.date.issued2018
dc.identifier10.1088/1361-648X/aaba04
dc.identifier.issn09538984
dc.identifier.urihttp://hdl.handle.net/11615/76344
dc.description.abstractIn this work we present a method of representing terms in the current-phase-relation of a ballistic Josephson junction by combinations of diagrams, used in previous work to represent an equivalent of the matching condition determinant of the junction. This is accomplished by the expansion of the logarithm of this determinant in Taylor series and keeping track of surviving terms, i.e. terms that do not annihilate each other. The types of the surviving terms are represented by connected graphs, whose points represent diagrammatic terms of the determinant expansion. Then the theory is applied to obtain approximations of the current-phase relation of relatively thick ballistic ferromagnetic Josephson junctions with non-collinear magnetizations. This demonstrates the versatility of the method in developing approximations schemes and providing physical insight into the nature of contributions to the supercurrent from the available particle excitations in the junction. We also discuss the strong second harmonic contribution to the supercurrent in junctions with three mutually orthogonal magnetization vectors and a weak intermediate ferromagnet. © 2018 IOP Publishing Ltd.en
dc.language.isoenen
dc.sourceJournal of Physics Condensed Matteren
dc.source.urihttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85046250571&doi=10.1088%2f1361-648X%2faaba04&partnerID=40&md5=f5ea839ec588d60ffa7beccc46655de8
dc.subjectBallisticsen
dc.subjectFerromagnetic materialsen
dc.subjectFerromagnetismen
dc.subjectGraphic methodsen
dc.subjectMagnetizationen
dc.subjectQuantum opticsen
dc.subjectCurrent-phase relationsen
dc.subjectdiagramsen
dc.subjectFerromagnetic Josephson junctionsen
dc.subjectgraphsen
dc.subjectJosephson effecten
dc.subjectJosephson junction devicesen
dc.subjectarticleen
dc.subjectexcitationen
dc.subjectInstitute of Physics Publishingen
dc.titleCurrent phase relation from graphs and diagrams and application to thick ferromagnetic Josephson junctionsen
dc.typejournalArticleen


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