Zero-Crossing Shapiro Step in Asymmetric Two-Junction Superconducting Quantum Interference Device
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概要
- 論文の詳細を見る
We demonstrate a zero-crossing Shapiro step in an asymmetric two-junction superconducting quantum interference device (SQUID) driven by one sinusoidal RF signal. The operation is based on the imbalanced evolution of the junction phases due to the tilted interference diagrams. A test circuit was fabricated using Nb/AlOx/Nb junction technology. When we applied an RF signal of 10 GHz, we observed a Shapiro step crossing the zero-current axis at the voltage position of the first order. The polarity of the step voltage was switched by a DC control flux to the SQUID loop. The experimental current–voltage curves were quantitatively reproduced by simulation.
- 2006-07-25
著者
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Kobayashi Tadayuki
Department Of Communications And Systems The University Of Electro-communications
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Mizugaki Yoshinao
Department Of Electronic Engineering The University Of Electro-communications
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Moriya Masataka
Department Of Electronic Engineering The University Of Electro-communications
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Usami Kouichi
Department of Electronic Engineering, The University of Electro-Communications, 1-5-1 Chofugaoka, Ch
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Katoh Kazuyuki
Department of Electronic Engineering, The University of Electro-Communications, 1-5-1 Chofugaoka, Chofu, Tokyo 182-8585, Japan
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