Dynamical Stabilization of Multiplet Supercurrents in Multiterminal Josephson Junctions.

Journal Article (Journal Article)

The dynamical properties of multiterminal Josephson junctions (MT-JJs) have attracted interest, driven by the promise of new insights into synthetic topological phases of matter and Floquet states. This effort has culminated in the discovery of Cooper multiplets in which the splitting of a Cooper pair is enabled via a series of Andreev reflections that entangle four (or more) electrons. Here, we show that multiplet resonances can also emerge as a consequence of the three-terminal circuit model. The supercurrent appears due to correlated phase dynamics at values that correspond to the multiplet condition nV 1 = -mV 2 of applied bias. Multiplet resonances are seen in nanofabricated three-terminal graphene JJs, analog three-terminal JJ circuits, and circuit simulations. The stabilization of the supercurrent is purely dynamical, and a close analog to Kapitza's inverted pendulum problem. We describe parameter considerations that optimize the detection of the multiplet lines both for design of future devices.

Full Text

Duke Authors

Cited Authors

  • Arnault, EG; Idris, S; McConnell, A; Zhao, L; Larson, TFQ; Watanabe, K; Taniguchi, T; Finkelstein, G; Amet, F

Published Date

  • September 2022

Published In

Volume / Issue

  • 22 / 17

Start / End Page

  • 7073 - 7079

PubMed ID

  • 35997531

Electronic International Standard Serial Number (EISSN)

  • 1530-6992

International Standard Serial Number (ISSN)

  • 1530-6984

Digital Object Identifier (DOI)

  • 10.1021/acs.nanolett.2c01999

Language

  • eng