Publication: Transverse rectification in superconducting thin films with arrays of asymmetric defects
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American Institute of Physics
Superconducting Nb films have been grown on top of arrays of Cu nanotriangles. These asymmetric pinning centers strongly modify the vortex lattice dynamics. Two rectification effects have been observed: (i) longitudinal ratchet effect when the input currents are injected perpendicular to the triangle reflection symmetry axis and (ii) transverse rectification effect hen the input currents are injected parallel to the triangle reflection symmetry axis and the output voltage drop occurs perpendicular to the triangle reflection symmetry axis. Increasing the applied magnetic field, the former shows a change of the output voltage polarity, the transverse output voltage does not show any polarity reversal.
© 2007 American Institute of Physics. The authors want to thank A. Kolton, V. Marconi, F. Nori, C. Olson-Reichhardt, C. Reichhardt, and S. Savel’ev for calling our attention to this transverse ratchet effect. They acknowledge funding support by Spanish Ministerio Educacion Ciencia grants NAN04-09087, FIS05-07392, MAT05-23924E, CAM grant S-0505/ESP/0337, and UCMSantander.