Regensburg 2002 – wissenschaftliches Programm

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TT: Tiefe Temperaturen

TT 17: Postersitzung II: Mesoskopische Systeme (1-19), Supraleiter: Theorie (20-26), Elektronenstruktur, Phononen, Tunneln, Ordnungsparameter (27-33), Schwere Fermionen, Kondo-Systeme (34-45)

TT 17.20: Poster

Mittwoch, 13. März 2002, 14:30–18:00, A

Characteristics of parallel and serial multi loop Josephson junction arrays consisting of unconventional superconductors — •Michael Seifried, Thomas Dahm, Christoph Häussler, Jörg Oppenländer, and Nils Schopohl — Institut für Theoretische Physik, Universität Tübingen, Auf der Morgenstelle 14, 72076 Tübingen

We calculate the critical current of Josephson junctions made of unconventional superconductors in the limit of weak barrier transparency[1]. These calculations are used to determine the characteristic structure factor of parallel and serial multi loop Josephson junction arrays[2],[3] for arbitrary temperatures and orientations of the cooper pair wave function. Applications of the theory include the design of superconducting quantum interference filters (SQIF’s) with novel flux to voltage transfer functions using high-Tc superconductors on bicrystal substrates. Such SQIFs allow improved phase-sensitive tests of the pairing symmetry of unconventional superconductors.

[1] A. Ashauer, G. Kieselmann, D. Rainer, J. Low Temp. Phys. 63, 349 (1986).

[2] J. Oppenländer, Ch. Häussler, N. Schopohl, Phys. Rev. B 63, 024511 (2001).

[3] J. Oppenländer, T. Träuble, C. Häussler, N. Schopohl, IEEE Trans. Appl. Supercond. 11, 1271 (2001).