A current mirror based on single electron devices |
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| Affiliation: | 166121. Quantronics Group, SPEC, CEA-Saclay, 91191 Gif-sur-Yvette Cedex, France;1. Institut für Exp. und Angew. Physik, Universität Regensburg, 93040 Regensburg, Germany;2. A.F. Ioffe Physicotechnical Institute, RAS, St. Petersburg, 194021, Russia;3. Institute of Semiconductor Physics, NASU, Kiev, 252028, Ukraine;1. National Institute of Standards and Technology, Boulder, CO, USA;2. Physics Department, University of Colorado, Boulder, CO, USA;3. Service de Physique de l''Etat Condensé, CEA-Saclay, Gif-sur-Yvette, France |
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| Abstract: | We have fabricated Coulomb blockade devices which act as current mirrors. Each sample consists of two nominally identical one-dimensional arrays of small tunnel junctions. Each electrode of one array is capacitively coupled to two electrodes in the other array. By measuring the current voltage characteristics of the two arrays simultaneously, we observe a coupling between the currents in the two arrays. We have studied the properties both in the superconducting state and in the normal state, and we interpret the data in terms of correlated transport of charges in the two arrays. The locking between the currents in the two arrays is strongest for intermediate magnetic fields where the electrodes are still superconducting. At best we find current locking over a range of ±6.7 pA |
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