Charge and spin transport on graphene grain boundaries in a quantizing magnetic field

Charge and spin transport on graphene grain boundaries in a quantizing magnetic field We study charge and spin transport along grain boundaries in single layer graphene in the presence of a quantizing perpendicular magnetic field. Transport states in a grain boundary are produced by the hybridization of Landau zero modes with interfacial states. In selected energy regimes quantum Hall edge states can be deflected either fully or partially into grain boundary states. The degree of edge state deflection is studied in the nonlocal conductance and in the shot noise. We also consider the possibility of grain boundaries as gate-switchable spin filters, a functionality enabled by counterpropagating transport channels laterally confined in the grain boundary. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Physical Review B American Physical Society (APS)

Charge and spin transport on graphene grain boundaries in a quantizing magnetic field

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Charge and spin transport on graphene grain boundaries in a quantizing magnetic field

Abstract

We study charge and spin transport along grain boundaries in single layer graphene in the presence of a quantizing perpendicular magnetic field. Transport states in a grain boundary are produced by the hybridization of Landau zero modes with interfacial states. In selected energy regimes quantum Hall edge states can be deflected either fully or partially into grain boundary states. The degree of edge state deflection is studied in the nonlocal conductance and in the shot noise. We also consider the possibility of grain boundaries as gate-switchable spin filters, a functionality enabled by counterpropagating transport channels laterally confined in the grain boundary.
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Publisher
The American Physical Society
Copyright
Copyright © ©2017 American Physical Society
ISSN
1098-0121
eISSN
1550-235X
D.O.I.
10.1103/PhysRevB.96.041403
Publisher site
See Article on Publisher Site

Abstract

We study charge and spin transport along grain boundaries in single layer graphene in the presence of a quantizing perpendicular magnetic field. Transport states in a grain boundary are produced by the hybridization of Landau zero modes with interfacial states. In selected energy regimes quantum Hall edge states can be deflected either fully or partially into grain boundary states. The degree of edge state deflection is studied in the nonlocal conductance and in the shot noise. We also consider the possibility of grain boundaries as gate-switchable spin filters, a functionality enabled by counterpropagating transport channels laterally confined in the grain boundary.

Journal

Physical Review BAmerican Physical Society (APS)

Published: Jul 5, 2017

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