13 Citations (Scopus)

Abstract

We study quantum transport in a general graphene system subject to external potential, a situation that can be expected in all kinds of future graphene-based electronic devices with quantum dots and quantum point contacts. We find that electrons tend to take on propagating paths due to Klein tunneling that have absolutely no counterpart in nonrelativistic quantum systems. Strikingly, such abnormal quantum paths can lead to an extreme type of fractal-like of conductance fluctuations, not seen previously in any quantum transport systems. This phenomenon has profound implications to the development of graphene based devices that require stable electronic properties.

Original languageEnglish (US)
Article number035426
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume84
Issue number3
DOIs
StatePublished - Jul 11 2011

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electron trajectories
Graphite
Point contacts
Graphene
graphene
Electrons
electronics
Electronic properties
Fractals
Semiconductor quantum dots
fractals
quantum dots
electrons

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

Cite this

Abnormal electron paths induced by Klein tunneling in graphene quantum point contacts. / Yang, Rui; Huang, Liang; Lai, Ying-Cheng; Grebogi, Celso.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 84, No. 3, 035426, 11.07.2011.

Research output: Contribution to journalArticle

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AU - Grebogi, Celso

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AB - We study quantum transport in a general graphene system subject to external potential, a situation that can be expected in all kinds of future graphene-based electronic devices with quantum dots and quantum point contacts. We find that electrons tend to take on propagating paths due to Klein tunneling that have absolutely no counterpart in nonrelativistic quantum systems. Strikingly, such abnormal quantum paths can lead to an extreme type of fractal-like of conductance fluctuations, not seen previously in any quantum transport systems. This phenomenon has profound implications to the development of graphene based devices that require stable electronic properties.

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