Controllable stepmotors and rectifiers of magnetic flux quanta
نویسندگان
چکیده
We study the transport of vortices in superconductors with square arrays of asymmetric pinning wells when applying an alternating electrical current. This system can induce a net rectifying or diode effect for the vortex motion, including collective stepmotor-type dynamics, where many vortices move forward a controlled and exact number of pin-latticespacings at each cycle of the AC driving force. This system exhibits a remarkable net DC response with striking sawtooth-type oscillations, which we have studied as a function of several parameters (e.g., field H , Amplitude of drive). We analytically derive the main numerical features obtained here. 2004 Elsevier B.V. All rights reserved.
منابع مشابه
Controllable step motors and rectifiers of magnetic flux quanta using periodic arrays of asymmetric pinning defects
B. Y. Zhu, F. Marchesoni, V. V. Moshchalkov, and Franco Nori* Frontier Research System, The Institute of Physical and Chemical Research (RIKEN), Wako-shi, Saitama 351-0198, Japan Istituto Nazionale di Fisica della Materia, Universitá di Camerino, I-62032 Camerino, Italy Laboratorium voor Vaste-Stoffysica en Magnetisme, Katholieke Universiteit Leuven, B-3001 Leuven, Belgium Center for Theoretica...
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