Magnetism and magnetotransport in disordered graphene

Details Magnetism and magnetotransport in disordered graphene Magnetism and magnetotransport in disordered graphene

2009-06-11

arxiv.org/abs/0906.2194v2

Phys. Rev. B 80, 245408 (2009)

Physics

Condensed Matter

Strongly Correlated Electrons

8 pages, 7 figures. Expanded version

Scientific paper

10.1103/PhysRevB.80.245408

We perform Monte Carlo simulations to study the interplay of structural and magnetic order in single layer graphene covered with magnetic adatoms. We propose that the presence of ripples in the graphene structure can lead to clustering of the adatoms and to a variety of magnetic states such as super-paramagnetism, antiferromagnetism, ferromagnetism and spin glass behavior. We derive the magnetization hysteresis and also the magnetoresistance curves in the variable range hopping regime, which can provide experimental signatures for ripple induced clustering and magnetism. We propose that the magnetic states in graphene can be controlled by gate voltage and coverage fraction.

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