Multiterminal Inverse AC Josephson Effect. Academic Article uri icon

abstract

  • When a Josephson junction is exposed to microwave radiation, it undergoes the inverse AC Josephson effectthe phase of the junction locks to the drive frequency. As a result, the I-V curves of the junction acquire "Shapiro steps" of quantized voltage. If the junction has three or more superconducting contacts, coupling between different pairs of terminals must be taken into account and the state of the junction evolves in a phase space of higher dimensionality. Here, we study the multiterminal inverse AC Josephson effect in a graphene sample with three superconducting terminals. We observe robust fractional Shapiro steps and correlated switching events, which can only be explained by considering the device as a completely connected Josephson network. We successfully simulate the observed behaviors using a modified two-dimensional RCSJ model. Our results suggest that multiterminal Josephson junctions are a playground to study highly connected nonlinear networks with novel topologies.

published proceedings

  • Nano Lett

altmetric score

  • 9.4

author list (cited authors)

  • Arnault, E. G., Larson, T., Seredinski, A., Zhao, L., Idris, S., McConnell, A., ... Finkelstein, G.

citation count

  • 18

complete list of authors

  • Arnault, Ethan G||Larson, Trevyn FQ||Seredinski, Andrew||Zhao, Lingfei||Idris, Sara||McConnell, Aeron||Watanabe, Kenji||Taniguchi, Takashi||Borzenets, Ivan||Amet, Fran├žois||Finkelstein, Gleb

publication date

  • January 2021