Chirality-Assisted Electronic Cloaking of Confined States in Bilayer Graphene
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, where...
| Main Authors: | , , |
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| Format: | Article |
| Language: | en_US |
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American Physical Society (APS)
2012
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| Online Access: | http://hdl.handle.net/1721.1/68680 https://orcid.org/0000-0002-4268-731X |
| _version_ | 1826188526964703232 |
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| author | Gu, Nan Rudner, Mark Levitov, Leonid |
| author2 | Massachusetts Institute of Technology. Department of Physics |
| author_facet | Massachusetts Institute of Technology. Department of Physics Gu, Nan Rudner, Mark Levitov, Leonid |
| author_sort | Gu, Nan |
| collection | MIT |
| description | 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. |
| first_indexed | 2024-09-23T08:01:00Z |
| format | Article |
| id | mit-1721.1/68680 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T08:01:00Z |
| publishDate | 2012 |
| publisher | American Physical Society (APS) |
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| spelling | mit-1721.1/686802022-09-30T01:41:56Z Chirality-Assisted Electronic Cloaking of Confined States in Bilayer Graphene Gu, Nan Rudner, Mark Levitov, Leonid Massachusetts Institute of Technology. Department of Physics Levitov, Leonid Gu, Nan Levitov, Leonid 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. United States. Office of Naval Research (Grant No. N00014-09-1-0724) 2012-01-27T18:54:56Z 2012-01-27T18:54:56Z 2011-10 2011-06 Article http://purl.org/eprint/type/JournalArticle 0031-9007 1079-7114 http://hdl.handle.net/1721.1/68680 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 https://orcid.org/0000-0002-4268-731X en_US http://dx.doi.org/10.1103/PhysRevLett.107.156603 Physical Review Letters Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. application/pdf American Physical Society (APS) APS |
| spellingShingle | Gu, Nan Rudner, Mark Levitov, Leonid Chirality-Assisted Electronic Cloaking of Confined States in Bilayer Graphene |
| title | Chirality-Assisted Electronic Cloaking of Confined States in Bilayer Graphene |
| title_full | Chirality-Assisted Electronic Cloaking of Confined States in Bilayer Graphene |
| title_fullStr | Chirality-Assisted Electronic Cloaking of Confined States in Bilayer Graphene |
| title_full_unstemmed | Chirality-Assisted Electronic Cloaking of Confined States in Bilayer Graphene |
| title_short | Chirality-Assisted Electronic Cloaking of Confined States in Bilayer Graphene |
| title_sort | chirality assisted electronic cloaking of confined states in bilayer graphene |
| url | http://hdl.handle.net/1721.1/68680 https://orcid.org/0000-0002-4268-731X |
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