Ac-Josephson effect in YBa2Cu3O7/YBa2Cu3O7 point contact junctions期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

Ac-Josephson effect in YBa2Cu3O7/YBa2Cu3O7 point contact junctions

Authors:	J. Niemeyer N. D. Kataria M. R. Dietrich C. Politis H. Koch R. Schöllhorn H. Eickenbusch

Affiliation:	(1) Physikalisch-Technische Bundesanstalt, Bundesallee 100, D-3300 Braunschweig, Federal Republic of Germany;(2) National Physical Laboratory, Dr. K.S. Krishnan Road, 110012 New Delhi, India;(3) Kernforschungszentrum Karlsruhe, Institut für Technische Physik, Postfach 3640, D-7500 Karlsruhe, Federal Republic of Germany;(4) Kernforschungszentrum Karlsruhe, Institut für Nukleare Festkörperphysik, Postfach 3640, D-7500 Karlsruhe, Federal Republic of Germany;(5) Physikalisch-Technische Bundesanstalt, Abbestrasse 10-12, D-1000 Berlin, Germany;(6) Institut für Anorganische und Analytische Chemie, Technische Universität Berlin, Strasse des 17. Juni 135, D-1000 Berlin, Germany

Abstract:	The ac-Josephson effect could be demonstrated up to dc voltages of 20 mV on the I–V characteristic of adjustable YBa₂Cu₃O₇/YBa₂Cu₃O₇ point contacts at 4.2 K. A detailed analysis of the rf power dependence of the size of microwave-induced constant voltage steps is given for microwave frequencies of 70 and 90 GHz. The results prove that electron pairing is responsible for the superconductivity in YBa₂Cu₃O₇.

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