High-Efficiency Deterministic Josephson Vortex Ratchet
نویسندگان
چکیده
منابع مشابه
Josephson vortex in a ratchet potential: theory.
We propose a type of Josephson vortex ratchet. In this system a Josephson vortex moves in a periodic asymmetric potential under the action of a deterministic or random force with zero time average. For some implementations the amplitude of the potential can be controlled during the experiment, thus allowing us to tune the performance of the system and build rocking as well as flashing ratchets....
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We present a deterministic, nonthermal ratchet where the trajectory of particles in a certain size range is not reversible when the sign of the pressure gradient is reversed at a low Reynolds number. This effect is produced by employing triangular rather than the conventional circular posts in an array that selectively displaces particles transported through the array. The ratchet irreversibly ...
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By means of electrical transport measurements we have studied the rectified motion of vortices in ratchet potentials engineered on overdamped Josephson junction arrays. The rectified voltage as a function of the vortex density shows a maximum efficiency close a matching condition to the period of the ratchet potential indicating a collective vortex motion. Vortex current reversals were detected...
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D. Perez de Lara,1,3 M. Erekhinsky,2 E. M. Gonzalez,3 Y. J. Rosen,2 Ivan K. Schuller,2 and J. L. Vicent1,3 1IMDEA-Nanociencia, Cantoblanco, E-28049 Madrid, Spain 2Physics Department, University of California San Diego, La Jolla, California 92093, USA 3Departamento Fisica de Materiales, Universidad Complutense, E-28040 Madrid, Spain (Received 9 December 2010; revised manuscript received 10 March...
متن کاملOrigin of reversed vortex ratchet motion.
We experimentally demonstrate that the origin of multiply reversed rectified vortex motion in an asymmetric pinning landscape not only is a consequence of the vortex-vortex interactions but also essentially depends on the ratio between the characteristic interaction distance and the period of the asymmetric pinning potential. We study four samples with different periods d of the asymmetric pote...
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ژورنال
عنوان ژورنال: Physical Review Letters
سال: 2005
ISSN: 0031-9007,1079-7114
DOI: 10.1103/physrevlett.95.090603