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Chiral quasiparticle tunneling between quantum Hall edges in proximity with a superconductor

Publication ,  Journal Article
Wei, MT; Draelos, AW; Seredinski, A; Ke, CT; Li, H; Mehta, Y; Watanabe, K; Taniguchi, T; Yamamoto, M; Tarucha, S; Finkelstein, G; Amet, F ...
Published in: Physical Review B
September 10, 2019

We study a two-terminal graphene Josephson junction with contacts shaped to form a narrow constriction, less than 100nm in length. The contacts are made from type-II superconducting contacts and able to withstand magnetic fields high enough to reach the quantum Hall regime in graphene. In this regime, the device conductance is determined by edge states, plus the contribution from the constricted region. In particular, the constriction area can support supercurrents up to fields of ∼2.5T. Additionally, enhanced conductance is observed through a wide range of magnetic fields and gate voltages. This additional conductance and the appearance of supercurrent is attributed to the tunneling between counterpropagating quantum Hall edge states along opposite superconducting contacts.

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Published In

Physical Review B

DOI

EISSN

2469-9969

ISSN

2469-9950

Publication Date

September 10, 2019

Volume

100

Issue

12

Related Subject Headings

  • 51 Physical sciences
  • 40 Engineering
  • 34 Chemical sciences
 

Citation

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Wei, M. T., Draelos, A. W., Seredinski, A., Ke, C. T., Li, H., Mehta, Y., … Borzenets, I. V. (2019). Chiral quasiparticle tunneling between quantum Hall edges in proximity with a superconductor. Physical Review B, 100(12). https://doi.org/10.1103/PhysRevB.100.121403
Wei, M. T., A. W. Draelos, A. Seredinski, C. T. Ke, H. Li, Y. Mehta, K. Watanabe, et al. “Chiral quasiparticle tunneling between quantum Hall edges in proximity with a superconductor.” Physical Review B 100, no. 12 (September 10, 2019). https://doi.org/10.1103/PhysRevB.100.121403.
Wei MT, Draelos AW, Seredinski A, Ke CT, Li H, Mehta Y, et al. Chiral quasiparticle tunneling between quantum Hall edges in proximity with a superconductor. Physical Review B. 2019 Sep 10;100(12).
Wei, M. T., et al. “Chiral quasiparticle tunneling between quantum Hall edges in proximity with a superconductor.” Physical Review B, vol. 100, no. 12, Sept. 2019. Scopus, doi:10.1103/PhysRevB.100.121403.
Wei MT, Draelos AW, Seredinski A, Ke CT, Li H, Mehta Y, Watanabe K, Taniguchi T, Yamamoto M, Tarucha S, Finkelstein G, Amet F, Borzenets IV. Chiral quasiparticle tunneling between quantum Hall edges in proximity with a superconductor. Physical Review B. 2019 Sep 10;100(12).

Published In

Physical Review B

DOI

EISSN

2469-9969

ISSN

2469-9950

Publication Date

September 10, 2019

Volume

100

Issue

12

Related Subject Headings

  • 51 Physical sciences
  • 40 Engineering
  • 34 Chemical sciences