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

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

1 Scopus Citations
View graph of relations

Author(s)

  • M. T. Wei
  • A. W. Draelos
  • A. Seredinski
  • C. T. Ke
  • H. Li
  • Y. Mehta
  • K. Watanabe
  • T. Taniguchi
  • M. Yamamoto
  • S. Tarucha
  • G. Finkelstein
  • F. Amet

Related Research Unit(s)

Detail(s)

Original languageEnglish
Article number121403(R)
Journal / PublicationPhysical Review B
Volume100
Issue number12
Online published10 Sep 2019
Publication statusPublished - 15 Sep 2019

Abstract

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.

Citation Format(s)

Chiral quasiparticle tunneling between quantum Hall edges in proximity with a superconductor. / Wei, M. T.; Draelos, A. W.; Seredinski, A.; Ke, C. T.; Li, H.; Mehta, Y.; Watanabe, K.; Taniguchi, T.; Yamamoto, M.; Tarucha, S.; Finkelstein, G.; Amet, F.; Borzenets, I. V.

In: Physical Review B, Vol. 100, No. 12, 121403(R), 15.09.2019.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review