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arXiv · 2004.14039

Half-Integer Shapiro Steps in a Short Ballistic InAs Nanowire Josephson Junction

Kento Ueda·Sadashige Matsuo·Hiroshi Kamata·Yosuke Sato·Yuusuke Takeshige·Kan Li·Lars Samuelson·Hongqi Xu·Seigo Tarucha
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Abstract

We report on half-integer Shapiro steps observed in an InAs nanowire Josephson junction. We observed the Shapiro steps of the short ballistic InAs nanowire Josephson junction and found anomalous half-integer steps in addition to the conventional integer steps. The half-integer steps disappear as the temperature increases or transmission of the junction decreases. These experimental results agree closely with numerical calculation of the Shapiro response for the skewed current phase relation in a short ballistic Josephson junction.

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Kento Ueda, Sadashige Matsuo, Hiroshi Kamata, Yosuke Sato, Yuusuke Takeshige, Kan Li, Lars Samuelson, Hongqi Xu, Seigo Tarucha. 2020-04-29. Half-Integer Shapiro Steps in a Short Ballistic InAs Nanowire Josephson Junction. https://doi.org/10.1103/physrevresearch.2.033435

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