Browsing School of Physics by Author "Power, Stephen"
Now showing items 1-10 of 10
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Dynamic RKKY interaction in graphene
(2012)The growing interest in carbon-based spintronics has stimulated a number of recent theoretical studies on the Ruderman-Kittel-Kasuya-Yosida (RKKY) interaction in graphene, based on which the energetically favorable alignment ... -
Emergence of local magnetic moments in doped graphene-related materials
(2009)Motivated by recent studies reporting the formation of localized magnetic moments in doped graphene, we investigate the energetic cost for spin polarizing isolated impurities embedded in this material. When a wellknown criterion ... -
Friedel Oscillations in graphene: Sublattice Asymmetry in Doping
(2013)Symmetry breaking perturbations in an electronically conducting medium are known to produce Friedel oscillations in various physical quantities of an otherwise pristine material. Here we show in a mathematically transparent ... -
Magnetization profile of magnetic impurities in graphene nanoribbons
(2011)The magnetic properties of graphene-related materials, and in particular, the spin-polarized edge states predicted for pristine graphene nanoribbons (GNRs) with certain edge geometries have received much attention recently ... -
Model of impurity segregation in graphene nanoribbons
(2009)The electronic properties of low-dimensional materials can be engineered by doping, but in the case of graphene nanoribbons GNRs the proximity of two symmetry-breaking edges introduces an additional dependence on the ... -
RKKY interaction between adsorbed magnetic impurities in graphene: symmetry and strain effects
(2013)The growing interest in carbon-based spintronics has stimulated a number of recent theoretical studies on the Ruderman-Kittel-Kasuya-Yosida (RKKY) interaction in graphene, with the aim of determining the most energetically ... -
RKKY interaction between extended magnetic defect lines in graphene
(2014)Of fundamental interest in the field of spintronics is the mechanism of indirect exchange coupling between magnetic impurities embedded in metallic hosts. A range of physical features, such as magnetotransport and overall ... -
Strain-induced modulation of magnetic interactions in graphene
(2012)The ease with which the physical properties of graphene can be tuned suggests a wide range of possible applications. Recently, strain engineering of these properties has been of particular interest. Possible spintronic ... -
Strain-modified RKKY interaction in carbon nanotubes
(2015)For low-dimensional metallic structures, such as nanotubes, the exchange coupling between localized magnetic dopants is predicted to decay slowly with separation. The long-range character of this interaction plays a ... -
Variable range of the RKKY interaction in edged graphene
(2014)The indirect exchange interaction is one of the key factors in determining the overall alignment of magnetic impurities embedded in metallic host materials. In this work we examine the range of this interaction in ...
