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arXiv · 1601.04434

Interplay Between Electron Over-Heating and ac Josephson Effect

Alessandro De Cecco·Kévin Le Calvez·Benjamin Sacépé·Clemens Winkelmann·Hervé Courtois
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Abstract

We study the response of high-critical current proximity Josephson junctions to a microwave excitation. Electron over-heating in such devices is known to create hysteretic dc voltage-current characteristics. Here we demonstrate that it also strongly influences the ac response. The interplay of electron over-heating and ac Josephson dynamics is revealed by the evolution of the Shapiro steps with the microwave drive amplitude. Extending the resistively shunted Josephson junction model by including a thermal balance for the electronic bath coupled to phonons, a strong electron over-heating is obtained.

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Alessandro De Cecco, Kévin Le Calvez, Benjamin Sacépé, Clemens Winkelmann, Hervé Courtois. 2016-05-27. Interplay Between Electron Over-Heating and ac Josephson Effect. https://doi.org/10.1103/physrevb.93.180505

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