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Showing 1 to 9 of 9 for “"Josephson coupling"”.
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Superconducting Proximity Effects and Josephson Coupling in CoFeB Structures
… also investigated in Nb/CoFeB/Nb ferromagnetic Josephson junctions - the second device type studied in this work. The key parameters of this particular materials system are characterised for the first time, and an increase in the Josephson critical current following thermal annealing up to a …
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Josephson coupling and proximity effects through helimagnetic rare earth interfaces
… with the Dy content. Highly oriented Nb/Ho/Nb Josephson junctions are also studied in this work. The electron mean-free-path in the normal state is longer in the textured junctions than in the polycrystalline junctions reported below but still below the thermal coherence length implying that …
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Conductivity and Interferometry Experiments on YBCO/lead Ramp-Edge Josephson Junctions
… YBa 2Cu3O7-y (YBCO) using YBCO/Pb ramp-edge Josephson junctions with lithographically defined corner and straight-edge geometries. Measurements of the critical current versus applied field, I c(H), and the an dynamic conductance, dI/dV, are presented. For junctions with corner geometries, as …
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Tunneling in Degenerate Atomic Gases
… part of this work deals with bosons in different Josephson-type experimental setups. After a brief general introduction we establish, in Chapter 2, a mapping between the phase and the Bogoliubov representation for the Josephson oscillations; in Chapter 3 we calculate the Josephson coupling …
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Computational modelling of the vortex state in high-temperature superconductors
… layered superconductors in the limit of zero Josephson coupling. The long-range nature of the electromagnetic interaction between pancake vortices in the c-direction allows us to employ a meanfield method: all attractive inter-layer interactions are described by a substrate potential, which …
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The Properties of Grain Boundaries in YBa2Cu3O7-d
Grain boundaries form the basis of an important Josephson junction technology in the cuprates and also limit the superconducting critical currents attainable in practical, polycrystalline materials. An improved understanding of these defects is therefore important for applications. The status of …
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Charge dynamics in superconducting double dots
… superconducting islands coupled together by a Josephson junction, with each dot connected to a normal state lead. The energy landscape consists of a two level manifold of even charge parity Cooper pair states, and continuous bands corresponding to charge states with single quasiparticles in one …
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Modification of Iron pnictide and MgB2 thin films using focused He+ ion beam irradiation for superconducting devices
… contours that evolve with increasing dose. The Josephson effect is a unique phenomenon that gives direct access to the phase difference �� of the macroscopic wave functions that describe the superconducting state. Josephson junction is also appealing for engineering application in …
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Proximity effects and vortex dynamics in mesoscopic superconductor-normal metal-superconductor arrays
"Anderson's scaling theory of localization has proven invaluable in characterizing the behavior of real systems, that is, those possessing any amount of disorder. The theory predicts that, at zero temperature in 1D and 2D systems, the diffusive motion of electrons scattering off impurities ceases, …