Browsing School of Physics by Sponsor "European Commission"
Now showing items 1-20 of 40
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Ab initio study of electron transport in dry poly(G)-poly(C) A-DNA strands
(2010)The bias-dependent transport properties of short poly (G)-poly(C) A-DNA strands attached to Au electrodes are investigated with first-principles electronic-transport methods. By using the nonequilibrium Green's function ... -
Antiferromagnetic single-layer spin-orbit torque oscillators
(2019)We show how a charge current through a single antiferromagnetic layer can excite and control self-oscillations. Sustained oscillations with tunable amplitudes and frequencies are possible in a variety of geometries using ... -
Characterising Complexity in Solar Magnetogram Data using a Wavelet-based Segmentation Method
(2010)The multifractal nature of solar photospheric magnetic structures are studied using the 2D wavelet transform modulus maxima (WTMM) method. This relies on computing partition functions from the wavelet transform skeleton ... -
Deceleration and dispersion of large-scale coronal bright fronts
(2011)Abstract: Context. One of the most dramatic manifestations of solar activity are large-scale coronal bright fronts (CBFs) observed in extreme ultraviolet (EUV) images of the solar atmosphere. To date, the energetics and ... -
Deterministic multi-level spin orbit torque switching using focused He+ ion beam irradiation
(2023)He+ ion irradiation is used to pattern multiple areas of Pt/Co/W films with different irradiation doses in Hall bars. The resulting perpendicular magnetic anisotropy landscape enables selective multilevel current-induced ... -
DEVELOPMENT OF MAGNETORESISTIVE SENSORS FOR NANOWIRE DETECTION TARGETED AT BIOLOGICAL APPLICATIONS
This research project has been focused on developing technologies for the detection of single segment and multi-segment magnetic nanowires using yoke shaped GMR sensors and TMR MgO-barrier magnetic tunnel junction sensors ... -
A direct-write, resistless hard mask for rapid nanoscale patterning of diamond
(2011)We introduce a simple, resist-free dry etch mask for producing patterns in diamond, both bulk and thin deposited films. Direct gallium ion beam exposure of the native diamond surface to doses as low as 1016 cm-2 forms a ... -
DMF-exfoliated graphene for electrochemical NADH detection
(2011)The electrochemical detection of NADH is of considerable interest because it is required as a cofactor in a large number of dehydrogenase-based biosensors. However, the presence of oxygenated functionalities on the electrode ... -
Effect of Hubbard U on the construction of low-energy Hamiltonians for LaMnO(3) via maximally localized Wannier functions
(American Physical Society, 2011)We use maximally localized Wannier functions to construct tight-binding (TB) parametrizations for the e(g) bands of LaMnO(3) based on first-principles electronic structure calculations. We compare two different ways to ... -
Electrical, Mechanical & Morphological Characterisation of Nanosheet Networks
(Trinity College Dublin. School of Physics. Discipline of Physics, 2021)Networks of two-dimensional nanosheets have demonstrated significant promise across a host of applications that span the breadth of materials science. While this has driven research into nanosheet-based devices at a ... -
Electronic and structural characterisation of polycrystalline platinum disulfide thin films
(2020)We employ a combination of scanning tunnelling microscopy (STM) and scanning tunnelling spectroscopy (STS) to investigate the properties of layered PtS2, synthesised via thermally assisted conversion (TAC) of a metallic ... -
Exceptionally strong magnetism in the 4d perovskites RTcO3 (R = Ca, Sr, Ba)
(2011)The evolution of the magnetic ordering temperature of the 4d3 perovskites RTcO3 (R=Ca, Sr, Ba) and its relation with its electronic and structural properties has been studied by means of hybrid density functional theory ... -
Exchange coupling and energy product in random two-phase aligned magnets.
(IEEE, 1994)Size effects in two-phase Boolean magnets composed of an aligned hard phase and a soft phase with high magnetization are investigated. In 'overcritical' magnets, where the size of the soft regions is larger than the Blochwall ... -
Exchange interactions and magnetic phases of transition metal oxides: Benchmarking advanced ab initio methods
(2011)The magnetic properties of the transition metal monoxides MnO and NiO are investigated at equilibrium and under pressure via several advanced first-principles methods coupled with Heisenberg Hamiltonian Monte Carlo. The ... -
Exfoliation and sensing application of 2D - materials
(Trinity College Dublin. School of Physics. Discipline of Physics, 2020)In the past decade, graphene and layered material such as Transition metal dichalcogenides (TMDs) and Transition metal oxides (TMOs) have been investigated for their importance in several applications. For example, these ... -
Femtosecond ultraviolet laser ablation of silver and comparison with nanosecond ablation
(2013)The ablation plume dynamics arising from ablation of silver with a 500 fs, 248nm laser at 2Jcm 2 has been studied using angle-resolved Langmuir ion probe and thin film deposition techniques. For the same laser fluence, ... -
Gold electrodeposition in organic media
(2011)Organic species are easily adsorbed onto metal electrodes, due to the high surface energy. This principle is widely employed in electrodeposition to obtain grains with a given shape and size. Electrodeposition in organic ... -
HELIO The Heliophysics Integrated Observatory
(2011)Heliophysics is a new research field that explores the Sun-Solar System Connection; it requires the joint exploitation of solar, heliospheric, magnetospheric and ionospheric observations. HELIO, the Heliophysics Integrated ... -
Imaging and identification of point defects in PtTe2
(2021)The properties and performance of two-dimensional (2D) materials can be greatly affected by point defects. PtTe2, a 2D material that belongs to the group 10 transition metal dichalcogenides, is a type-II Dirac semimetal, ... -
Magnetic Field Enhancement of Water Evaporation in Confined Spaces
(2023)Water is studied in confined environments where it evaporates into its own vapor. Simultaneous experiments are conducted for 0.4–0.5 µL droplets confined at the center of 54 mm long microchannels with a cross section of ...