2014/09/25 by Eric Suárez Morell, P. Vargas, Morell, Eric Suárez +7
Physics and Astronomy · #FOS: Physical sciences #Mesoscale and Nanoscale Physics (cond-mat.mes-hall) #cond-mat.mes-hall
paper · pdf · doi:10.48550/arxiv.1409.7279
5 pages, 4 figures. To be published in Physical Revew B
arxiv created 2015/01/22 · arxiv updated 2015/01/23
We address the origin of bead-like edge states observed by scanning tunneling microscopy (STM) in moiré patterns of graphite. Low-bias scanning tunneling spectroscopy measurements indicate these edge states are centered around AB stacking sites, contrarily to the common assumption of them being at AA sites. This shift of the intensity of the beads with respect to the bulk moiré pattern has been corroborated by a tight-binding calculation of the edge states in bilayer nanoribbons. Our results are valid not only for graphite but also for few-layer graphene, where these states have also been recently observed.