Browsing by Author "Ferreira, Mauro"
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Co-percolation to tune conductive behaviour in dynamical metallic nanowire networks
Ferreira, Mauro; Boland, John (2016)Nanowire networks act as self‐healing smart materials, whose sheet resistance can be tuned via an externally applied voltage stimulus. This memristive response occurs due to modification of junction resistances to form a ... -
Collective capacitive and memristive responses in random nanowire networks: Emergence of critical connectivity pathways
Boland, John; Ferreira, Mauro (2018)Random nanowire networks (NWNs) are promising synthetic architectures for non-volatile memory devices and hardware-based neuromorphic applications due to their history-dependent re- sponses, recurrent connectivity, and ... -
Dynamic RKKY interaction in graphene
Ferreira, Mauro; Power, Stephen (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 ... -
Effective medium theory for the conductivity of disordered metallic nanowire networks
Ferreira, Mauro; Boland, John (2016)Motivated by numerous technological applications, there is current interest in the study of the conductive properties of networks made of randomly dispersed nanowires. The sheet resistance of such networks is normally ... -
The Electro-Optical Performance of Silver Nanowire Networks
Ferreira, Mauro (2019)Networks of metallic nanowires have the potential to meet the needs of next-generation device technologies that require flexible transparent conductors. At present, there does not exist a first principles model capable of ... -
Emergence of local magnetic moments in doped graphene-related materials
Ferreira, Mauro; Power, Stephen (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 ... -
Emergence of Winner-takes-all Connectivity Paths in Random Nanowire Networks
Ferreira, Mauro (2018) -
Finite-size correction scheme for supercell calculations in Dirac-point two-dimensional materials
Ferreira, Mauro (2018) -
Friedel Oscillations in graphene: Sublattice Asymmetry in Doping
Ferreira, Mauro; Power, Stephen (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
Ferreira, Mauro; Power, Stephen (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
Ferreira, Mauro; Power, Stephen (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 ... -
Nonlinear ion drift-diffusion memristance description of TiO2 RRAM devices
Boland, John; Ferreira, Mauro (2020)The nature and direction of the hysteresis in memristive devices is critical to device operation and performance and the ability to realise their potential as neuromorphic applications. TiO2 is a prototypical memristive ... -
On the relationship between morphology and conductivity in nanosheet networks
Rafferty, Aran; Coleman, Jonathan; Ferreira, Mauro (2021)It is well-known that the morphology of nanostructured networks is closely linked to network properties. However, controlling and characterizing the morphology of networks of 2D nanosheets has not been explored. In this ... -
Oxide-mediated self-limiting recovery of field effect mobility in plasma-treated MoS2
Mc Guinness, Cormac; Zhang, Hongzhou; Ferreira, Mauro; Bradley, Louise; Boland, John; Nicolosi, Valeria (2018) -
The Resistance of Cu Nanowire-Nanowire Junctions & Electro-Optical Modeling of Cu Nanowire Networks
Boland, John; Ferreira, Mauro (2020)Flexible transparent conductors made from networks of metallic nanowires are a potential replacement for conventional, non-flexible, and transparent conducting materials such as indium tin oxide. Cu nanowires are particularly ... -
RKKY interaction between adsorbed magnetic impurities in graphene: symmetry and strain effects
Ferreira, Mauro; Power, Stephen (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
Ferreira, Mauro; Power, Stephen (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
Ferreira, Mauro; Power, Stephen (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
Ferreira, Mauro; Power, Stephen (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
Ferreira, Mauro; Power, Stephen (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 ...