[21p-B204-1~19] 11.4 Analog applications and their related technologies

3:15 PM - 3:30 PM JST(6:15 AM - 6:30 AM UTC)

[21p-B204-7] Numerical Simulation of Giant Fractional Shapiro Steps using 2D RSJ Model.

〇Hirotake Yamamori¹, Kazumasa Makise^1,2, Shuichi Nagasawa¹, Mutsuo Hidaka¹ (1.AIST, 2.NAOJ)

Keywords:

Fractional Shapiro Step

When a microwave frequency f is applied to a Josephson junction, Shapiro steps of an integral multiple of the voltage V=πh/2ef appear due to the AC Josephson effect. It has been reported that fractional Shapiro steps such as 1/2 and 1/3 appear in 2D Josephson junction arrays when an external magnetic field is applied. However, since a fractional Shapiro step is observed even in a single Josephson junction, the cause was investigated by numerical calculation and compared with experimental results.