Microwave-induced quantum voltages across Josephson tunnel junctions

D. N. Langenberg, Douglas J. Scalapino, Barry N. Taylor +1 more

T.V. Rajeevakumar, John X. Przybysz, J. T. Chen

J. T. Chen, R. J. Todd, Y.W. Kim

We have studied the power dependence of the microwave-induced dc voltages across "unbiased" Pb---Pb oxide---Pb Josephson tunnel junctions and found a systematic dependence. We have also found that the Josephson effect in the form of induced quantum voltages was observable in a large dc magnetic field as high as 0.5 kG, about one-half of the ${H}_{c2}$ of the superconducting Pb film.

S. Rombetto

Minoru Ito, Yoichi Enomoto, Minoru Suzuki +2 more

The microwave-induced, quantized high dc voltage of about 2 mV across the unbiased BaPb0.7Bi0.3O3 Josephson tunnel junction array is observed. The nearly rectangular hysteresis loop due to the voltage generation appears in the current-voltage curve. The induced voltage polarity can easily be switched by an external pulse current input signal of only 50 A/cm2. This voltage switching can probably be exploited in the Josephson junction array as a future logic element.

Igor A. Devyatov, Alexander Brinkman, Alexandr Golubov +1 more