Browsing School of Physics by Sponsor "Irish Research Council for Science and Engineering Technology (IRCSET)"
Now showing items 21-35 of 35
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Large-scale Bright Fronts in the Solar Corona: A Review of "EIT waves"
(2010)?EIT waves? are large-scale coronal bright fronts (CBFs) that were first observed in 195 ? images obtained using the Extreme-ultraviolet Imaging Telescope (EIT) onboard the Solar and Heliospheric Observatory (SOHO). Commonly ... -
Magnetic structuring of linear copper electrodeposits
(2012)Electrodeposition of copper is investigated in localized magnetic fields produced by linear arrays of permanent magnets. The thickness and texture of the deposits depend on the magnitude and direction of the field. The ... -
Magnetism in hafnium dioxide
(2005)Thin films of HfO2 produced by pulsed-laser deposition on sapphire, yttria-stabilized zirconia, or silicon substrates show ferromagnetic magnetization curves with little hysteresis and extrapolated Curie temperatures far ... -
Multiprobe quantum spin Hall bars
(2014)We analyze electron transport in multiprobe quantum spin Hall (QSH) bars using the B¨uttiker formalism and draw parallels with their quantum Hall (QH) counterparts. We find that in a QSH bar the measured resistance changes ... -
New evidence for the influence of step morphology on the formation of Au atomic chains on vicinal Si(111) surfaces
(2010)Gold atomic chain structures that grow on singular and vicinal Si(111) surfaces have attracted considerable interest as model systems for exploring quasi-one-dimensional metallic behaviour. The structure of the prototypical ... -
Nitrogen assisted etching of graphene layers in a scanning electron microscope
(2011)We describe the controlled patterning of nanopores in graphene layers by using the low-energy (<10?keV) focused electron beam in a scanning electron microscope. Regular nanometer-sized holes can be fabricated with the ... -
Ordered polyhedral foams in tubes with circular, triangular and square cross-section
(2011)Soap bubbles of equal volume readily crystallize as ordered polyhedral foam structures when introduced into tubes whose width is of the same order as the bubble diameter. In the past a large number of these structures have ... -
A pertubative approach to the Kondo effect in magnetic atoms on nonmagnetic substrates
(2011)Recent experimental advances in scanning tunneling microscopy make the measurement of the conductance spectra of isolated and magnetically coupled atoms on nonmagnetic substrates possible. Notably these spectra are ... -
Perturbative approach to the Kondo effect in magnetic atoms on nonmagnetic substrates
(2011)Recent experimental advances in scanning tunneling microscopy make the measurement of the conductance spectra of isolated and magnetically coupled atoms on nonmagnetic substrates possible. Notably, these spectra ... -
QUANTIFYING THE EVOLVING MAGNETIC STRUCTURE OF ACTIVE REGIONS
(2010)The topical and controversial issue of parameterizing the magnetic structure of solar active regions has vital implications in the understanding of how these structures form, evolve, produce solar flares, and decay. This ... -
Size selection of dispersed, exfoliated graphene flakes by controlled centrifugation
(2012)Liquid exfoliation of graphene generally results in flakes with lateral size of one micron or less on average, too small for many applications. In this paper we describe a method to separate an existing dispersion with ... -
Spin-flip inelastic electron tunneling spectroscopy in atomic chains
(2011)We present a theoretical study of the spin transport properties of monoatomic magnetic chains with a focus on the spectroscopical features of the I - V curve associated with spin-flip processes. Our calculations are based ... -
Temperature-dependent magnetic second-harmonic generation from Fe nanostructures grown on vicinal W(110)
(2011)Temperature-dependent magnetic second-harmonic generation (MSHG) at normal incidence (NI) is used to determine magnetization curves from Au-capped ultrathin Fe nanostructures grown on a vicinal W(110) substrate. Aligned ... -
Topological surface states scattering in antimony
(2012)In this work we study the topologically protected states of the Sb(111) surface by using ab initio transport theory. In the presence of a strong surface perturbation we obtain standing-wave states resulting from the ... -
Topological Tuning in Three-Dimensional Dirac Semimetals
(2014)We study with first-principles methods the interplay between bulk and surface Dirac fermions in three dimensional Dirac semimetals. By combining density functional theory with the coherent potential approximation, we reveal ...