TITLE

Midgap state-based π-junctions for digital applications

AUTHOR(S)
Testa, G.; Monaco, A.; Esposito, E.; Sarnelli, E.; Kang, D.-J.; Mennema, S. H.; Tarte, E. J.; Blamire, M. G.
PUB. DATE
August 2004
SOURCE
Applied Physics Letters;8/16/2004, Vol. 85 Issue 7, p1202
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Midgap state-based YBa2Cu3O7-x π-junctions have been fabricated by a focused ion-beam system using 45° symmetric [001] tilt SrTiO3 bicrystal substrates. Measurements, performed by inserting the junctions in a superconducting loop (as a double-phase sensitive test), show both an unconventional nonmonotonic temperature dependence of the Josephson current, with a local minimum at a crossover temperature T* and, around T*, a half flux quantum shift in the critical current versus magnetic field modulations, clear signs of a 0–π crossover with temperature. Such results demonstrate that conventional 45° symmetric grain boundary junctions may have potential for applications, from digital circuits to quantum computing.
ACCESSION #
14085028

 

Related Articles

  • ANGLE DEPENDENT CRITICAL-CURRENT MEASUREMENTS ON A LONG TILTED-IBAD COATED CONDUCTOR. Coulter, J. Y.; Willis, J. O.; Hänisch, J. // AIP Conference Proceedings;3/3/2008, Vol. 986 Issue 1, p471 

    As coated conductor technology based on REBa2Cu3O7-x (REBCO, RE rare earth or Y) has evolved, so has the need to determine the critical current (Ic) performance as a function of applied magnetic field magnitude and direction on long wires. These measurement capabilities have typically only been...

  • Eliminating thickness dependence of critical current density in YBa2Cu3O7-x films with aligned BaZrO3 nanorods. Xiang Wang; Baca, F. Javier; Emergo, Rose L. S.; Wu, Judy Z.; Haugan, Timothy J.; Barnes, Paul N. // Journal of Applied Physics;Dec2010, Vol. 108 Issue 11, p113911 

    The thickness dependence of critical current density (Jc) has been investigated in YBa2Cu3O7-x films with BaZrO3 (BZO) nanorods (YBCO/BZO) aligned along the film normal. With the presence of linear defects in the YBCO/BZO films, the thickness dependence of Jc becomes negligible at self field and...

  • Effect of the misalignment between the applied and internal magnetic fields on the critical currents of “tilted coated conductors”. Maiorov, B.; Gibbons, B. J.; Kreiskott, S.; Matias, V.; Holesinger, T. G.; Civale, L. // Applied Physics Letters;3/28/2005, Vol. 86 Issue 13, p132504 

    We present angular-dependent measurements of the critical current density (Jc) of a YBa2Cu3O7 film grown on tilted buffered Ion-Beam-Assisted-Deposition MgO metal tapes. We compare samples with the current parallel and perpendicular to the tape’s direction. In samples with the current...

  • Observation of current crowding near fabricated voids in gold lines. Yongsunthon, R.; Stanishevsky, A.; McCoy, J.; Williams, E. D. // Applied Physics Letters;4/30/2001, Vol. 78 Issue 18, p2661 

    The spatial variation of current density in lines with model void defects fabricated using focused-ion beam milling has been imaged using magnetic force microscopy (MFM). At current densities of 3-4x10[sup 6] A/cm[sup 2], an asymmetry in the MFM signal is clearly visible at (1x1) μm[sup 2]...

  • A segmented Faraday cup for two-dimensional representation of the current distribution of an ion... Knolle, D.; Ratschko, D. // Review of Scientific Instruments;Sep96, Vol. 67 Issue 9, p3082 

    Reports on the development of a Faraday cup to measure the two-dimensional current distribution and total beam current of an ion beam. Reproducible current measurements; Use of the Faraday cup to measure ion beams; Determination of the current on the basis of the voltage drop at selected metal...

  • Magnetic field measurement of RIKEN IRC sector magnets. Ohnishi, J.; Mitsumoto, T.; Goto, A.; Yano, Y. // AIP Conference Proceedings;2001, Vol. 600 Issue 1, p351 

    Magnetic field measurements of the RIKEN IRC sector magnets were made with a newly constructed field mapping system. Using mapping data of the base and trim coil fields for several field levels, production of the isochronous field for a typical ion beam was attempted and the measured field was...

  • Propagation of a narrow plasma beam in an oblique magnetic field. Heidbrink, W. W.; Adams, D.; Drum, S.; Evans, K.; Manson, J.; Price, T.; Urayama, P.; Wessel, F. J. // Physics of Fluids B: Plasma Physics;Oct92, Vol. 4 Issue 10, p3454 

    The propagation of an intense neutralized ion beam (ν ∼ 5 × 10[sup 8] cm/sec, n ∼ 10[sup 10] cm[sup -3]) through a large insulated vacuum chamber is measured as a function of magnetic field strength and direction. When the beam propagates parallel to the applied field, beam...

  • Z-discharge transport of intense ion beams for inertial confinement fusion. Ottinger, P. F.; Rose, D.V.; Mosher, D.; Neri, J. M. // Journal of Applied Physics;11/15/1991, Vol. 70 Issue 10, p5292 

    Evaluates light ion beam transport in a wall-stabilized z-discharge channel, where the discharge azimuthal magnetic field radially confines the ion beam. Determination of the injection efficiency under various conditions; Transport schemes for a light-ion laboratory microfusion facility;...

  • Determination of the capacitance of nm scale Josephson junctions. Deppe, Frank; Saito, Shiro; Tanaka, Hirotaka; Takayanagi, Hideaki // Journal of Applied Physics;3/1/2004, Vol. 95 Issue 5, p2607 

    Superconducting three-Josephson-junction flux qubits (3JFQB) are possible candidates for the basic elements of a (future) scalable quantum computer. An important design parameter is the capacitance of their Josephson junctions. We estimate the capacitance per junction area (specific capacitance)...

Share

Read the Article

Courtesy of VIRGINIA BEACH PUBLIC LIBRARY AND SYSTEM

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics