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          Institute: Fritz-Haber-Institut     Collection: Theory     Display Documents



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ID: 395647.0, Fritz-Haber-Institut / Theory
Quantum interference at the twist boundary in graphene
Authors:Shallcross, S.; Sharma, S.; Pankratov, Oleg A.
Language:English
Date of Publication (YYYY-MM-DD):2008-08-01
Title of Journal:Physical Review Letters
Journal Abbrev.:Phys. Rev. Lett.
Volume:101
Issue / Number:5
Start Page:056803-1
End Page:056803-4
Review Status:not specified
Audience:Experts Only
Abstract / Description:We explore the consequences of a rotation between graphene layers for the electronic spectrum. We derive the commensuration condition in real space and show that the interlayer electronic coupling is governed by an equivalent commensuration in reciprocal space. The larger the commensuration cell, the weaker the interlayer coupling, with exact decoupling for incommensurate rotations and in the θ → 0 limit. Furthermore, from first-principles calculations we determine that even for the smallest possible commensuration cell the decoupling is effectively perfect, and thus graphene layers will be seen to decouple for all rotation angles.
External Publication Status:published
Document Type:Article
Communicated by:Matthias Scheffler
Affiliations:Fritz-Haber-Institut/Theory
External Affiliations:Lehrstuhl für Theoretische Festkörperphysik, Staudstr. 7-B2, 91058 Erlangen, Germany

Institut für Theoretische Physik, Freie Universität Berlin, Arnimallee 14, D-14195 Berlin, Germany
Identifiers:URL:http://scitation.aip.org/getabs/servlet/GetabsServ... [only for subscriber]
DOI:10.1103/PhysRevLett.101.056803 [only for subscriber]
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