Supercurrent Flow in Multiterminal Graphene Josephson Junctions.
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We investigate the electronic properties of ballistic planar Josephson junctions with multiple superconducting terminals. Our devices consist of monolayer graphene encapsulated in boron nitride with molybdenum-rhenium contacts. Resistance measurements yield multiple resonant features, which are attributed to supercurrent flow among adjacent and nonadjacent Josephson junctions. In particular, we find that superconducting and dissipative currents coexist within the same region of graphene. We show that the presence of dissipative currents primarily results in electron heating and estimate the associated temperature rise. We find that the electrons in encapsulated graphene are efficiently cooled through the electron-phonon coupling.
ballistic Josephson junctions
multiterminal current flow
Published Version (Please cite this version)10.1021/acs.nanolett.8b04330
Publication InfoDraelos, Anne; Finkelstein, Gleb; Wei, Ming-Tso; Seredinski, Andrew; Li, Hengming; Mehta, Yash; ... Amet, François (2019). Supercurrent Flow in Multiterminal Graphene Josephson Junctions. Nano letters, 19(2). pp. 1039-1043. 10.1021/acs.nanolett.8b04330. Retrieved from https://hdl.handle.net/10161/18108.
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Professor of Physics
Gleb Finkelstein is an experimental physicist interested in inorganic and biologically inspired nanostructures: carbon nanotubes, graphene, and self-assembled DNA 'origami'. These objects reveal a variety of interesting electronic properties that may form a basis for future detectors and sensors, or serve as individual devices in quantum information processing.
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