[TuP3E] E. Physics, spintronics, and novel device concepts

[TuP3E-04] "Device Fabrication towards Surface Phonon Irradiation on Josephson Junctions"

〇Ryusei Kawasoko^1,2, Tomoya Morita^1,2, Shohei Kobayashi^1,2, Shunsuke Ota³, Tetsuo Kodera¹, Takahiro Moriyama⁴, Seigo Tarucha^2,5, Sadashige Matsuo^1,2 (1. Dept. of Physics, Inst. of Science Tokyo (Japan), 2. RIKEN Center for Emergent Matter Science (Japan), 3. Dept. of Electrical and Electronic Engineering, Inst. of Science Tokyo (Japan), 4. Dept. of Materials Physics, Nagoya Univ. (Japan), 5. RIKEN Center for Quantum Computing (Japan))

Josephson junctions(JJs) exhibit characteristic superconducting transport properties that can be highly controlled by external parameters such as magnetic fields and microwave irradiation. Surface acoustic waves (SAWs), which propagate along piezoelectric substrates, are expected to provide a new control parameter for JJs However, there have been no experimental reports on SAWs irradiation on JJs. In this study, we fabricated a device integrating a Superconductor-Normalconductor-Superconductor (SNS) JJ on a LiNbO3 substrate with an interdigital transducer for exciting surface SAWs. This enables gigahertz-frequency SAWs irradiation and establishes a foundation for studying the modulation of superconducting transport properties by SAW.