Coherent Jetting from 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

Coherent Jetting from 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

Research output: Contribution to journal › Article › peer-review

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.

Original language	English
Journal	Physical Review Letters
Publication status	Accepted/In press - 18 May 2021

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National Graphene Institute

Cite this

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title = "Coherent Jetting from a gate-defined Channel in Bilayer Graphene",

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.",

author = "Carolin Gold and Angelika Knothe and Annika Kurzmann and Aitor Garcia-Ruiz and Kenji Watanabe and Takashi Taniguchi and Vladimir Fal'ko and Klaus Ensslin and Thomas Ihn",

year = "2021",

month = may,

day = "18",

language = "English",

journal = "Physical Review Letters",

issn = "0031-9007",

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T1 - Coherent Jetting from a gate-defined Channel in Bilayer Graphene

AU - Gold, Carolin

AU - Knothe, Angelika

AU - Kurzmann, Annika

AU - Garcia-Ruiz, Aitor

AU - Watanabe, Kenji

AU - Taniguchi, Takashi

AU - Fal'ko, Vladimir

AU - Ensslin, Klaus

AU - Ihn, Thomas

PY - 2021/5/18

Y1 - 2021/5/18

N2 - 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.

AB - 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.

M3 - Article

JO - Physical Review Letters

JF - Physical Review Letters

SN - 0031-9007

ER -

Coherent Jetting from a gate-defined Channel in Bilayer Graphene

Abstract

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