Tunable Band Structure Effects on Ballistic Transport in Graphene Nanoribbons - Condensed Matter > Materials ScienceReportar como inadecuado




Tunable Band Structure Effects on Ballistic Transport in Graphene Nanoribbons - Condensed Matter > Materials Science - Descarga este documento en PDF. Documentación en PDF para descargar gratis. Disponible también para leer online.

Abstract: Graphene nanoribbons GNR in mutually perpendicular electric and magneticfields are shown to exhibit dramatic changes in their band structure andelectron transport properties. A strong electric field across the ribboninduces multiple chiral Dirac points, closing the semiconducting gap inarmchair GNR-s. A perpendicular magnetic field induces partially formed Landaulevels as well as dispersive surface-bound states. Each of the applied fieldson its own preserves the even symmetry $E {k} = E {-k}$ of the subbanddispersion. When applied together, they reverse the dispersion parity to be oddand gives $E {e,k} = -E {h,-k}$ and mix the electron and hole subbands withinthe energy range corresponding to the change in potential across the ribbon.This leads to oscillations of the ballistic conductance within this energyrange.



Autor: Oleksiy Roslyak, Godfrey Gumbs, Danhong Huang

Fuente: https://arxiv.org/







Documentos relacionados