131 citations · 610 across the 21 of their papers we have counts for
15 papers · 1 filter
Time-resolved impurity-invisibility in graphene nanoribbons
Riku Tuovinen, Michael A. Sentef, Claudia Gomes da Rocha +1
We investigate time-resolved charge transport through graphene nanoribbons supplemented with adsorbed impurity atoms. Depending on the location of the impurities with respect to th…
Impurity invisibility in graphene: Symmetry guidelines for the design of efficient sensors
John Duffy, James A Lawlor, Caio Lewenkopf +1
Renowned for its sensitivity to detect the presence of numerous substances, graphene is an excellent chemical sensor. Unfortunately, which general features a dopant must have in or…
The influence of Gaussian strain on sublattice selectivity of impurities in graphene
James A Lawlor, Claudia G Rocha, Vanessa Torres +2
Among the different strategies used to induce the opening of a band gap in graphene, one common practice is through chemical doping. While a gap may me opened in this way, disorder…
Sublattice Segregation of Hydrogen Adsorbates in Carbon Nanotubes
James A. Lawlor, Mauro S. Ferreira
Recent experimental observations have reported that, rather than randomly distributed, nitrogen atoms may prefer to be located on one of the two sub-lattices of graphene. It has be…
Green Functions of Graphene: An Analytic Approach
James A. Lawlor, Mauro S. Ferreira
In this article we derive the lattice Green Functions (GFs) of graphene using a Tight Binding Hamiltonian incorporating both first and second nearest neighbour hoppings and allowin…
Sublattice asymmetry of impurity doping in graphene: A review
James A. Lawlor, Mauro S. Ferreira
In this review we highlight recent theoretical and experimental work on sublattice asymmetric doping of impurities in graphene, with a focus on substitutional Nitrogen dopants. It…
RKKY interaction between extended magnetic defect lines in graphene
Paul D. Gorman, John M. Duffy, Stephen R. Power +1
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 featu…
Sublattice imbalance of substitutionally doped nitrogen in graphene
James A. Lawlor, Paul D. Gorman, Stephen R. Power +2
Motivated by the recently observed sublattice asymmetry of substitutional nitrogen impurities in CVD grown graphene, we show, in a mathematically transparent manner, that oscillati…
Friedel Oscillations in Graphene: Sublattice Asymmetry in Doping
James A. Lawlor, Stephen R. Power, Mauro S. Ferreira
Symmetry breaking perturbations in an electronically conducting medium are known to produce Friedel oscillations (FOs) in various physical quantities of an otherwise pristine mater…
Electronic transport on carbon nanotube networks: a multiscale computational approach
Luiz F. C. Pereira, M. S. Ferreira
Carbon nanotube networks are one of the candidate materials to function as malleable, transparent, conducting films, with the technologically promising application of being used as…
Indirect Exchange and Ruderman-Kittel-Kasuya-Yosida (RKKY) Interactions in Magnetically-Doped Graphene
Stephen R. Power, Mauro S. Ferreira
Magnetically-doped graphene systems are potential candidates for application in future spintronic devices. A key step is to understand the pairwise interactions between magnetic im…
Graphene as a non-magnetic spin-current lens
F. S. M. Guimarães, A. T. Costa, R. B. Muniz +1
In spintronics, the ability to transport magnetic information often depends on the existence of a spin current traveling between two different magnetic objects acting as source and…
A computationally efficient method for calculating the maximum conductance of disordered networks: Application to 1-dimensional conductors
Luiz F. C. Pereira, C. G. Rocha, A. Latge +1
Random networks of carbon nanotubes and metallic nanowires have shown to be very useful in the production of transparent, conducting films. The electronic transport on the film dep…
Contact-induced spin polarization in carbon nanotubes
Mauro S. Ferreira, Stefano Sanvito
Motivated by the possibility of combining spintronics with molecular structures, we investigate the conditions for the appearance of spin-polarization in low-dimensional tubular sy…
Exponential behavior of the interlayer exchange coupling across non-magnetic metallic superlattices
M. S. Ferreira, J. d'Albuquerque e Castro, R. B. Muniz +1
It is shown that the coupling between magnetic layers separated by non-magnetic metallic superlattices can decay exponentially as a function of the spacer thickness , as opposed…