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Symmetries and the conductance of graphene nanoribbons with long-range disorder

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Wurm, Jürgen ; Wimmer, Michael ; Richter, Klaus
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arXiv PDF (25.11.2011)
Date of publication of this fulltext: 27 Apr 2012 06:29


We study the conductance of graphene nanoribbons with long-range disorder. Due to the absence of intervalley scattering from the disorder potential, time-reversal symmetry (TRS) can be effectively broken even without a magnetic field, depending on the type of ribbon edge. Even though armchair edges generally mix valleys, we show that metallic armchair nanoribbons possess a hidden pseudovalley ...


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