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Reversible transitions in high - Tc cuprates based point contacts |
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| Authors: | L.F. Rybaltchenko N.L. Bobrov V.V. Fisun I.K. Yanson A.G.M. Jansen P. Wyder |
| Affiliation: | High Magnetic Field Laboratory, Max-Planck-Institut für Festk?rperforschung and Centre National de la Recherche Scientifique, B.P. 166, 38042, Grenoble Cedex 9, France B. Verkin Institute for Low Temperature Physics and Engineering, 47 Lenin Avenue, 310164, Kharkov, Ukraine |
| Abstract: | The influence of electric fields and currents has been investigated in the high- superconductors YBaCuO and BiSrCaCuO using a point-contact geometry with Ag as the counterelectrode, which reveal switching transitions between states of a different resistance. The origin of this effect in point contacts is associated with electromigration of the oxygen, driven by the electric field as well as by the current-induced “electron wind”. The switching effect preserves its basic features at elevated temperatures up to room temperature and in high magnetic fields up to 10 T. Received 23 November 1998 |
| Keywords: | PACS. 74.72.-h High-Tc compounds - 74.80.Fp Point contacts SN and SNS junctions - 66.30.Qa Electromigration |
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