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Paper detail

Exploring the graphene edges with coherent electron focusing

We study theoretically the coherent electron focusing in graphene nanoribbons. Using semiclassical and numerical tight binding calculations we show that perfect armchair edges give rise to equidistant peaks in the focusing spectrum. In the case of zigzag edges at low magnetic fields one can also observe focusing peaks but with increasing magnetic field a more complex interference structure emerges in the spectrum. This difference in the spectra can be observed even if the zigzag edge undergoes structural reconstruction. Therefore transverse electron focusing can help in the identification and characterisation of the edge structure of graphene samples.

preprint2010arXivOpen access
Peter RakytaAndor KormanyosJozsef CsertiPekka Koskinen
cond-mat.mes-hall
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Peter RakytaAndor KormanyosJozsef CsertiPekka Koskinen

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