Coherent Jetting from a gate-defined Channel in Bilayer Graphene

Research output: Contribution to journalArticlepeer-review

  • External authors:
  • Carolin Gold
  • Annika Kurzmann
  • Aitor Garcia-Ruiz
  • Kenji Watanabe
  • Takashi Taniguchi
  • Klaus Ensslin
  • Thomas Ihn

Abstract

Graphene has evolved as a platform for quantum transport that can compete with the best and cleanest semiconductor systems. Here, we report on the observation of distinct electronic jets emanating from a narrow split-gate dened channel in bilayer graphene. We find that these jets, which are visible via their interference patterns, occur predominantly with an angle of 60º between each other. This observation is related to the trigonal warping in the bandstructure of bilayer graphene, which, in conjuction with electron injection through a constriction, leads to a valleydependent selection of momenta. This experimental observation of electron jetting has consequences for carrier transport in two-dimensional materials with a trigonally warped bandstructure in general as well as for devices relying on ballistic and valley-selective transport.

Bibliographical metadata

Original languageEnglish
JournalPhysical Review Letters
Publication statusAccepted/In press - 18 May 2021