Quantum Hall–based superconducting interference device
| Autor: | Takashi Taniguchi, Hengming Li, Gleb Finkelstein, Tate Fleming, Francois Amet, Anne Draelos, Ethan G. Arnault, Ming-Tso Wei, Andrew Seredinski, Kenji Watanabe |
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| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
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 |
| Zdroj: | Science Advances |
| ISSN: | 2375-2548 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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