Ground states of one and two fractional vortices in long Josephson 0-kappa-junctions

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dc.creatorGoldobin, E.
dc.creatorKoelle, D.
dc.creatorKleiner, R.
dc.date2004-05-05
dc.date2004-08-11
dc.date.accessioned2026-07-07T02:57:59Z
dc.date.available2026-07-07T02:57:59Z
dc.descriptionHalf integer Josephson vortices in 0-$π$-junctions, discussed theoretically and observed experimentally, spontaneously appear at the point where the Josephson phase is $π$-discontinuous. The creation of \emph{arbitrary} discontinuities of the Josephson phase has been demonstrated recently. Here we study fractional vortices formed at an arbitrary $κ$-discontinuity, discuss their stability and possible ground states. The two stable states are not mirror symmetric. Furthermore, the possible ground states formed at two $κ$-discontinuities separated by a distance $a$ are investigated, and the energy and the regions of stability of each ground state are calculated. We also show that the ground states may strongly depend on the distance $a$ between the discontinuities. There is a crossover distance $a_c$ such that for $a<a_c$ and for $a>a_c$ the ground states may be qualitatively different.
dc.description7 figures, submitted to PRB In v.2 one figure is added, and refs are updated In v.3 major revision, many issues fixed
dc.identifierhttps://arxiv.org/abs/cond-mat/0405078
dc.identifierhttp://arxiv.org/abs/cond-mat/0405078
dc.identifierPhys. Rev. B 70, 174519 (2004)
dc.identifierdoi:10.1103/PhysRevB.70.174519
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/23894
dc.subjectSuperconductivity
dc.titleGround states of one and two fractional vortices in long Josephson 0-kappa-junctions
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