Electrically tunable resonant scattering in fluorinated bilayer graphene

Adam A. Stabile, Aires Ferreira, Jing Li, N. M.R. Peres, J. Zhu

Research output: Contribution to journalArticle

16 Scopus citations

Abstract

Adatom-decorated graphene offers a promising new path towards spintronics in the ultrathin limit. We combine experiment and theory to investigate the electronic properties of dilutely fluorinated bilayer graphene, where the fluorine adatoms covalently bond to the top graphene layer. We show that fluorine adatoms give rise to resonant impurity states near the charge neutrality point of the bilayer, leading to strong scattering of charge carriers and hopping conduction inside a field-induced band gap. Remarkably, the application of an electric field across the layers is shown to tune the resonant scattering amplitude from fluorine adatoms by nearly twofold. The experimental observations are well explained by a theoretical analysis combining Boltzmann transport equations and fully quantum-mechanical methods. This paradigm can be generalized to many bilayer graphene-adatom materials, and we envision that the realization of electrically tunable resonance may be a key advantage in graphene-based spintronic devices.

Original languageEnglish (US)
Article number121411
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume92
Issue number12
DOIs
StatePublished - Sep 28 2015

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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