School of Physics: Recent submissions
Now showing items 181-200 of 2200
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Data-driven time propagation of quantum systems with neural networks
(2022)We investigate the potential of supervised machine learning to propagate a quantum system in time. While Markovian dynamics can be learned easily, given a sufficient amount of data, non-Markovian systems are nontrivial and ... -
Spectral neighbor representation for vector fields: Machine learning potentials including spin
(2022)We introduce a translational and rotational invariant local representation for vector fields, which can be employed in the construction of machine learning energy models of solids and molecules. This allows us to describe, ... -
Equilibrium states of confined ions in two dimensions
(2023)Ions that are trapped in two dimensions and are subject to a harmonic confining potential have widely varying stationary states that exhibit various asymptotic forms and bifurcations. We present a ‘birds-eye’ view of these ... -
Tuneable plasmonic metasurfacesfor on-chip beam steering applications using vanadium dioxide
(Trinity College Dublin. School of Physics. Discipline of Physics, 2023)For centuries, optical components were created using bulk components of various refractive indexes where light accumulates phase over a path much longer than its wavelength. With the advent of nanofabrication techniques, ... -
Solution processed, vertically stacked hetero-structured diodes based on liquid-exfoliated WS2 nanosheets: from electrode-limited to bulk-limited behavior
(2022)Vertically stacked metal–semiconductor-metal heterostructures, based on liquid-processed nanomaterials, hold great potential for various printed electronic applications. Here we describe the fabrication of such devices by ... -
High-Mobility Flexible Transistors with Low-Temperature Solution-Processed Tungsten Dichalcogenides
(2023)The investigation of high-mobility two-dimensional (2D) flakes beyond molybdenum disulfide (MoS2) will be necessary to create a library of high-mobility solution-processed networks that conform to substrates and remain ... -
Amorphous 2D-Nanoplatelets of Red Phosphorus Obtained by Liquid-Phase Exfoliation Yield High Areal Capacity Na-Ion Battery Anodes
(2023)The development of sodium ion batteries will require high-performance elec-trodes with very large areal capacity and reasonable rate performance. Although red phosphorus is a very promising electrode material, it has not ... -
Highly conductive and long-term stable films from liquid-phase exfoliated platinum diselenide
(2022)Liquid-phase exfoliation (LPE) has been introduced as a versatile and scalable production method for two-dimensional (2D) materials. This method yields dispersions that allow for the fabrication of printable and flexible ... -
Collagen/pristine graphene as an electroconductive interface material for neuronal medical device applications
(2022)The growing clinical demand for electrical stimulation-based therapies requires the development of novel conductive biomaterials that balance conductivity, biocompatibility, and mechanical performance. Traditional conductive ... -
Inverse Problems in Disordered Systems
(Trinity College Dublin. School of Physics. Discipline of Physics, 2023)It is a simple Quantum Mechanics problem to find the electronic conductance of a device by directly solving the Schrodinger Equation. Obviously, this is the case if and only if the underlying Hamiltonian is known, i.e., ... -
Post-fabrication tuning of Hybrid Plasmonic Nanostructures with VO2
(Trinity College Dublin. School of Physics. Discipline of Physics, 2023)The development of hybrid plasmonic nanostructures and metamaterials to control electromagnetic radiation on the nanoscale has been at the centre of scientific research for the past few decades. Utilising the surface plasmon ... -
Large Reversible Plasmon Shift with Au Nanodisc Dimers on Thin film VO2
(2022)By coupling Au dimer nanostructures to an underlying thin film of phase change material, vanadium dioxide, significant shifts in the plasmonic scattering spectra are observed, allowing for dynamic tuning within the visible ... -
Direct laser writing of submicron photonic arrays for vapor-responsive sensing
(2022)A two photon polymerization technique was used to fabricate 2D photonic crystals based on a vapor-responsive hydrogel. By testing their vapor sensing performance, these photonic arrays were found to exhibit dynamic stimulus ... -
Magnetic Forces in Paramagnetic Fluids
(2022)An overview of the effect of a magnetic field gradient on fluids with linear magnetic susceptibilities is given. It is shown that two commonly encountered expressions, the magnetic field gradient force and the concentration ... -
Evaporation of water and urea solution in a magnetic field; the role of nuclear isomers
(2023)Hypothesis Ortho and para water are the two nuclear isomers where the hydrogen protons align to give a total nuclear spin of 1 or 0. The equilibrium ratio of 3:1 is established slowly in freshly evaporated water vapour ... -
Au4Mn: A localized ferromagnet with strong spin-orbit coupling, long-rangeferromagnetic exchange, and high Curie temperature
(2022)Metallic Mn-based alloys with a nearest-neighbor Mn-Mn distance greater than 0.4 nm exhibit large, well-localized magnetic moments. Here we investigate the magnetism of tetragonal Au 4 Mn with a Curie temperature of ... -
Electrical detection of magnetic skyrmyons in a magnetic tunnel junction
(2022)Magnetic skyrmions are promising information carriers for dense and energy-efficient information storage owing to their small size, low driving-current density, and topological stability. Electrical detection of skyrmions ... -
Deformation and necking of liquid droplets in a magnetic field.
(2022)Pendant droplets of water and paramagnetic solutions are studied in the presence of uniform and nonuniform magnetic fields produced by small permanent magnet arrays, both in static conditions and during dynamic pinch-off. ... -
Noncollinear ferrimagnetism and anomalous Hall effects in Mn4N thin films
(2022)Thin films of Mn 4 N and related ternary metallic perovskites with perpendicular anisotropy are interesting for spintronics, but their magnetic structures differ from the triangular ferrimagnetism of the bulk. A ... -
Rare-earth-free noncollinear metallic ferrimagnets Mn4-xZxN with compensation at room temperature
(2022)Compensated ferrimagnets show no net magnetization like antiferromagnets, but their transport and magneto-optic properties resemble those of ferromagnets, thereby creating opportunities for applications in high-frequency ...
