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- W1991758503 abstract "In a conventional Josephson junction of graphene, the supercurrent is not turned off even at the charge neutrality point, impeding further development of superconducting quantum information devices based on graphene. Here we fabricate bipolar Josephson junctions of graphene, in which a p–n potential barrier is formed in graphene with two closely spaced superconducting contacts, and realize supercurrent ON/OFF states using electrostatic gating only. The bipolar Josephson junctions of graphene also show fully gate-driven macroscopic quantum tunnelling behaviour of Josephson phase particles in a potential well, where the confinement energy is gate tuneable. We suggest that the supercurrent OFF state is mainly caused by a supercurrent dephasing mechanism due to a random pseudomagnetic field generated by ripples in graphene, in sharp contrast to other nanohybrid Josephson junctions. Our study may pave the way for the development of new gate-tuneable superconducting quantum information devices. Josephson junctions composed of graphene are limited by incomplete gate control of the supercurrent, impeding their development for superconducting quantum devices. Here, the authors fabricate bipolar Josephson junctions of graphene, allowing supercurrent on/off switching through electrostatic gating." @default.
- W1991758503 created "2016-06-24" @default.
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- W1991758503 date "2013-09-23" @default.
- W1991758503 modified "2023-09-26" @default.
- W1991758503 title "Complete gate control of supercurrent in graphene p–n junctions" @default.
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- W1991758503 doi "https://doi.org/10.1038/ncomms3525" @default.
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