1. Quantum Hall–based superconducting interference device
- Author
-
Takashi Taniguchi, Hengming Li, Gleb Finkelstein, Tate Fleming, Francois Amet, Anne Draelos, Ethan G. Arnault, Ming-Tso Wei, Andrew Seredinski, and Kenji Watanabe
- Subjects
Josephson effect ,Physics::Medical Physics ,02 engineering and technology ,Quantum Hall effect ,01 natural sciences ,law.invention ,Physics::Popular Physics ,law ,Condensed Matter::Superconductivity ,0103 physical sciences ,010306 general physics ,Research Articles ,Physics ,Superconductivity ,Multidisciplinary ,Condensed matter physics ,Graphene ,Filling factor ,Supercurrent ,SciAdv r-articles ,Landau quantization ,021001 nanoscience & nanotechnology ,Condensed Matter::Mesoscopic Systems and Quantum Hall Effect ,Condensed Matter Physics ,Physics::History of Physics ,Magnetic field ,0210 nano-technology ,Research Article - Abstract
Pushing superconductivity to the edge: Physicists make a SQUID using quantum Hall edge states., We present a study of a graphene-based Josephson junction with dedicated side gates carved from the same sheet of graphene as the junction itself. These side gates are highly efficient and allow us to modulate carrier density along either edge of the junction in a wide range. In particular, in magnetic fields in the 1- to 2-T range, we are able to populate the next Landau level, resulting in Hall plateaus with conductance that differs from the bulk filling factor. When counter-propagating quantum Hall edge states are introduced along either edge, we observe a supercurrent localized along that edge of the junction. Here, we study these supercurrents as a function of magnetic field and carrier density.
- Published
- 2019