Year: 2025
Type: article
Abstract: Multiterminal Josephson circuits have been proposed as a promising platform to host synthetic topological phases of matter, Floquet states, and multiplet supercurrents that are mediated by pairs of Cooper pairs. Here, we explore a Josephson circuit in which three superconducting electrodes are connected through Josephson junctions to a common superconducting island. We demonstrate the dynamic generation of the multiplet supercurrents, which are found to be robust to elevated temperatures and are confirmed by exhibiting the expected Shapiro step quantization under a microwave drive. We also find an unexpected novel supercurrent, which couples a pair of contacts that are both voltage-biased with respect to the common superconducting island. We show that this supercurrent also results from synchronization of the phase dynamics of the device, opening pathways to study the interplay of nonlinear, quantum, and topological physics.
Source: Physical Review Letters
Authors: Ethan G. Arnault, John Chiles, Trevyn F. Q. Larson, Chun-Chia Chen, Lingfei Zhao, Kenji Watanabe, Takashi Taniguchi, François Amet, Gleb Finkelstein
Language: English
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
Funders: Research Triangle Nanotechnology Network, National Science Foundation, U.S. Department of Energy, Duke University, Ministry of Education, Culture, Sports, Science and Technology, Japan Society for the Promotion of Science, Division of Electrical, Communications and Cyber Systems, Basic Energy Sciences, Division of Materials Sciences and Engineering
Awards: Multiterminal Graphene Josephson Junctions, G4001090325, G4091894760, NNCI: North Carolina Research Triangle Nanotechnology Network (RTNN), Research for synthesis of BCN crystals and their characterizations, G5107568500, G5641079820, G6166674427, NEW: SYMMETRIES, INTERACTIONS AND CORRELATION EFFECTS IN CARBON NANOTUBES; PI-GLEB FINKELSTEIN, G8392389417, G8657803787, G8670403042, G8732170877, G8890787282
OpenAlex ID: W4407321617