Wurm, Jürgen and Wimmer, Michael and Richter, Klaus
Symmetries and the conductance of graphene nanoribbons with long-range disorder.
Phys Rev B 85, p. 245418.
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Other URL: http://prb.aps.org/abstract/PRB/v85/i24/e245418, http://arxiv.org/abs/1111.5969
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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