Regensburg 2013 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 64: Superconductivity: Heterostructures, Andreev Scattering, Vortex Physics
TT 64.12: Vortrag
Donnerstag, 14. März 2013, 18:00–18:15, H21
Enhancement of critical current in mesoscopic superconducting strips by external magnetic field — •Konstantin Ilin, Dagmar Henrich, Yannick Luck, Lea Fuchs, Johannes Maximilian Meckbach, and Michael Siegel — Institut für Mikro- und Nanoelektronische Systeme, Karlsruher Institut für Technologie, Hertzstraße 16, 76187 Karlsruhe, Germany
Current crowding in superconducting mesoscopic strips with bends results in decrease of critical current in these structures with respect to the strips without geometrical non-uniformities [1-3]. Recently it has been shown that Meissner currents induced by externally applied magnetic field of appropriate direction allow to suppress this effect so that Ic(B) can exceed Ic(0) [4]. Experimental dependencies of critical current in mesoscopic bended strips made from ultra-thin superconducting films on externally applied magnetic field and their comparison to the theoretical predictions will be presented and discussed.
[1] Phys. Rev. B 84, 174510 (2011)
Phys. Rev. B 86, 144504 (2012)
Appl. Phys. Lett. 100, 182602 (2012)
Phys. Rev. B 85, 144511 (2012