Supercurrent Flow in Multiterminal Graphene Josephson Junctions.


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.





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Publication Info

Draelos, Anne W, Ming-Tso Wei, Andrew Seredinski, Hengming Li, Yash Mehta, Kenji Watanabe, Takashi Taniguchi, Ivan V Borzenets, et al. (2019). Supercurrent Flow in Multiterminal Graphene Josephson Junctions. Nano letters, 19(2). pp. 1039–1043. 10.1021/acs.nanolett.8b04330 Retrieved from

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Gleb Finkelstein

Professor of Physics

Gleb Finkelstein is an experimentalist interested in physics of quantum nanostructures, such as Josephson junctions and quantum dots made of carbon nanotubes, graphene, and topological materials. These objects reveal a variety of interesting electronic properties that may form a basis for future quantum devices.

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