Europhys. Lett, 47 (5), pp. 615-620 (1999)
Microwaves-induced oscillations in Andreev tunneling
A. Vaknin and Z. Ovadyahu
The Racah Institute of Physics, The Hebrew University - Jerusalem 91904, Israel
(received 18 May 1999; accepted 8 July 1999)
PACS. 73.40Gk - Tunneling.
PACS. 72.80Ng - Disordered solids.
PACS. 74.80Fp - Point contacts; SN and SNS junctions.
In the presence of a microwave field the current-voltage characteristics
tunnel junctions acquire an oscillatory component that shows up as peaks in the vs. V plots. We show that this phenomenon is qualitatively different than the previously reported microwave-induced structure in superconducting devices. While some aspects of the phenomenon resemble photon-assisted tunneling processes, the detailed behavior suggests that it involves destruction of Andreev tunneling.
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