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18 April 2024 |
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Coherent Jetting behind a gate-defined Channel in Bilayer Graphene | | Carolin Gold
; Angelika Knothe
; Annika Kurzmann
; Aitor Garcia-Ruiz
; Kenji Watanabe
; Takashi Taniguchi
; Vladimir Fal'ko
; Klaus Ensslin
; Thomas Ihn
; | | Date: |
20 Aug 2020 | | Abstract: | Graphene has evolved as a platform for quantum transport that can compete
with the best and cleanest semiconductor systems. Recently, many interesting
local properties of carrier transport in graphene have been investigated by
various scanning probe techniques. Here, we report on the observation of
distinct electronic jets emanating from a narrow split-gate defined channel in
bilayer graphene. We find that these jets, which are visible via their
interference patterns, occur predominantly with an angle of 60° between
each other. This observation is related to the specific bandstructure of
bilayer graphene, in particular trigonal warping, which leads to a
valley-dependent selection of momenta for low-energy conduction channels. This
experimental observation of electron jetting has consequences for carrier
transport in graphene in general as well as for devices relying on ballistic
and valley selective transport. | | Source: | arXiv, 2008.09145 | | Services: | Forum | Review | PDF | Favorites | |
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