Chirality-Assisted Electronic Cloaking of Confined States in Bilayer Graphene
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Gu-2011-Letters-Chirality-Assisted Electronic Cloaking of Confined States.pdf
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Author(s)
Gu, Nan
Rudner, Mark
Levitov, Leonid
Date Issued
October 2011
Journal
Physical Review Letters
Publisher
American Physical Society (APS)
Citation
Gu, Nan, Mark Rudner, and Leonid Levitov. “Chirality-Assisted Electronic Cloaking of Confined States in Bilayer Graphene.” Physical Review Letters 107.15 (2011): n. pag. Web. 27 Jan. 2012. © 2011 American Physical Society
Version
Final published version
Abstract
We show that the strong coupling of pseudospin orientation and charge carrier motion in bilayer graphene has a drastic effect on transport properties of ballistic p-n-p junctions. Electronic states with zero momentum parallel to the barrier are confined under it for one pseudospin orientation, whereas states with the opposite pseudospin tunnel through the junction totally uninfluenced by the presence of confined states. We demonstrate that the junction acts as a cloak for confined states, making them nearly invisible to electrons in the outer regions over a range of incidence angles. This behavior is manifested in the two-terminal conductance as transmission resonances with non-Lorentzian, singular peak shapes. The response of these phenomena to a weak magnetic field or electric-field-induced interlayer gap can serve as an experimental fingerprint of electronic cloaking.
MIT Department
Massachusetts Institute of Technology. Department of Physics
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DOI of Published Version
https://doi.org/10.1103/PhysRevLett.107.156603
