Stacking-dependent superstructures at stepped armchair interfaces of bilayer/trilayer graphene

Asieh Kazemi Sheikh Shabani, Simon Crampin, Adelina Ilie

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We present the first study of quantum interference patterns at a bilayer-trilayer armchair interface, for different stacking sequences. Visualization using scanning tunneling microscopy and theoretical calculations provide direct evidence that near armchair edges electron behavior is dominated by the "hard" edge, where the layer is abruptly truncated, as opposed to the "soft" edges, where layers continue across the boundary. Intervalley reflection causes universal quenching of the wavefunction with a periodicity of three C atoms, while the exact interference patterns depend on the stacking sequence and appear to be robust to disorder and chemical terminations.
Original languageEnglish
Article number163111
Number of pages5
JournalApplied Physics Letters
Issue number17
Early online date24 Apr 2013
Publication statusPublished - 29 Apr 2013


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