Electron Beam Supercollimation in Graphene Superlattices

Simple item page
dc.creatorPark, Cheol-Hwan
dc.creatorSon, Young-Woo
dc.creatorYang, Li
dc.creatorCohen, Marvin L.
dc.creatorLouie, Steven G.
dc.date2008-08-23
dc.date.accessioned2026-07-07T10:01:54Z
dc.date.available2026-07-07T10:01:54Z
dc.descriptionAlthough electrons and photons are intrinsically different, importing useful concepts in optics to electronics performing similar functions has been actively pursued over the last two decades. In particular, collimation of an electron beam is a long-standing goal. We show that ballistic propagation of an electron beam with virtual no spatial spreading or diffraction, without a waveguide or external magnetic field, can be achieved in graphene under an appropriate class of experimentally feasible one-dimensional external periodic potentials. The novel chiral quasi-one-dimensional metallic state that the charge carriers are in originates from a collapse of the intrinsic helical nature of the charge carriers in graphene owing to the superlattice potential. Beyond providing a new way to constructing chiral one-dimensional states in two dimensions, our findings should be useful in graphene-based electronic devices (e.g., for information processing) utilizing some of the highly developed concepts in optics.
dc.description7 pages, 4 figures (including supporting online material), published online in Nano Letters
dc.identifierhttps://arxiv.org/abs/0808.3198
dc.identifierhttp://arxiv.org/abs/0808.3198
dc.identifierNano Lett. 8, 2920-2924 (2008).
dc.identifierdoi:10.1021/nl801752r
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/168790
dc.subjectMesoscale and Nanoscale Physics
dc.titleElectron Beam Supercollimation in Graphene Superlattices
dc.typetext

Files

Collections

arXiv