Browsing Physics by Title
Now showing items 328-347 of 2103
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d-zero Magnetism in Nanoporous Amorphous Alumina Membranes
(2018)Nanoporous alumina membranes produced by mild or hard anodisation in oxalic acid at potentials ranging from 5 – 140 V have a controllable pore surface area of up to 200 times the membrane area. They exhibit a saturating ... -
Daemonic ergotropy: Enhanced work extraction from quantum correlations
(2017)We investigate how the presence of quantum correlations can influence work extraction in closed quantum systems, establishing a new link between the field of quantum non-equilibrium thermodynamics and the one of quantum ... -
Data-driven enhancement of cubic phase stability in mixed-cation perovskites
(2021)Mixing cations has been a successful strategy in perovskite synthesis by solution-processing, delivering improvements in the thermodynamic stability as well as in the lattice parameter control. Unfortunately, the relation ... -
Data-driven magnetic materials inverse design
(Trinity College Dublin. School of Physics. Discipline of Physics, 2024)Magnetic materials have diverse applications across multiple sectors, ranging from magnetic resonance imaging machines, used to detect diseases, to electric motors, sensors, and wind turbines just to name a few. The demand ... -
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 ... -
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 ... -
Decay Rates near layers of Au Nanospheres
(2012)The decay rate of quantum emitters near a layer of Au nanospheres is studied in the framework of a Green’s tensor formalism. The localized surface plasmons that can be excited on the gold spheres provide a strong avenue for ... -
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 ... -
Defect annealing in a II-VI laser diode structure under intense optical excitation
(1998)Defect annealing under intense pulsed optical excitation has been observed in a II?VI laser diode structure at room temperature. More than one order of magnitude increase in photoluminescence intensity has been obtained ... -
Defect engineering of ultra-thin layered molybdenum disulfide towards novel memristive and optoelectronic applications
(Trinity College Dublin. School of Physics. Discipline of Physics, 2019)In the ever-evolving field of nanoelectronics, new paradigms are constantly sought-after to improve the performance of next-generation circuit components. In the last decade, two-dimensional (2D) semiconductors have emerged ... -
Defect-trapped electrons and ferromagnetic exchange in ZnO
(2011)A model for ferromagnetism observed at ambient temperature in films of oxides such as ZnO is proposed and evaluated. The ferromagnetic moment in the model arises from electrons trapped at negatively charged vacancies in ... -
Deformation and fracture of crystalline tungsten and fabrication of composite STM probes
(2020)Fracturing microscale constrictions in metallic wires, such as tungsten, platinum, or platinum-iridium, is a common fabrication method used to produce atomically sharp tips for scanning tunneling microscopy (STM), ... -
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. ... -
Deformation and Yield of Polymer Thin Films in Confined Geometries
(Trinity College Dublin. School of Physics. Discipline of Physics, 2019)Polymer thin film mechanics represents a hugely promising field of research. Due to their versatility and ease of fabrication, polymer films and coatings rank among the most ubiquitous systems in all of nanotechnology. The ... -
Demonstration and interpretation of "scutoid" cells formed in a quasi-2D soap froth
(2018)Recently a novel type of epithelial cell has been discovered and dubbed the ‘scutoid’. It is induced by curvature of the bounding surfaces. We show by simulations and experiments that such cells are to be found in a dry ... -
Dense packings of spheres in cylinders: Simulations
(2012)We study the optimal packing of hard spheres in an infinitely long cylinder, using simulated annealing, and compare our results with the analogous problem of packing disks on the unrolled surface of a cylinder. The densest ... -
Densest Columnar Structures of Hard Spheres from Sequential Deposition
(2011)The rich variety of densest columnar structures of identical hard spheres inside a cylinder can surprisingly be constructed from a simple and computationally fast sequential deposition of cylinder-touching spheres, if the ... -
Density controlled conductivity of pristine graphene films
(2013)Single or few layer graphene can be considered an exciting pseudo-two-dimensional molecular material that potentially has a wide range of applications. A critical bottleneck may arise with issues in their controlled assembly ... -
Density-functional study of Fe3AL: LSDA versus GGA
(American Physical Society, 2002)The local-spin-density approximation and the generalized-gradient approximation ~GGA! are used to perform density-functional total-energy calculations at zero temperature for Fe3Al in the ordered D03 and L12 structures. ...
