Two coupled Josephson junctions: dc voltage controlled by biharmonic current
arXiv:1110.5287 · doi:10.1088/0953-8984/24/8/085702
Abstract
We study transport properties of two Josephson junctions coupled by an external shunt resistance. One of the junction (say, the first) is driven by an unbiased ac current consisting of two harmonics. The device can rectify the ac current yielding a dc voltage across the first junction. For some values of coupling strength, controlled by an external shunt resistance, a dc voltage across the second junction can be generated. By variation of system parameters like the relative phase or frequency of two harmonics, one can conveniently manipulate both voltages with high efficiency, e.g., changing the dc voltages across the first and second junctions from positive to negative values and vice versa.
15 pages, 7 figures, to appear in J. Phys. Condens. Matter (2012)
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Cited by in corpus (4)
- Negative mobility of a Brownian particle: strong damping regime
- Proximity-reduced range of internal phase differences in double Josephson junctions with closely spaced interfaces
- Tunable diode effect in a superconducting tunnel junction with biharmonic drive
- Directed transport in coupled noisy Josephson junctions controlled via ac signals