Skip to main content

Research Repository

Advanced Search

All Outputs (133)

III-V semiconductor waveguides for photonic functionality at 780 nm (2014)
Journal Article
Maclean, J. O., Greenaway, M. T., Campion, R. P., Pyragius, T., Fromhold, T. M., Kent, A. J., & Mellor, C. J. (2014). III-V semiconductor waveguides for photonic functionality at 780 nm. Proceedings of SPIE, 8988, Article 898805. https://doi.org/10.1117/12.2039898

Photonic integrated circuits based on III-V semiconductor polarization-maintaining waveguides were designed and fabricated for the first time for application in a compact cold-atom gravimeter1,2 at an operational wavelength of 780 nm. Compared with o... Read More about III-V semiconductor waveguides for photonic functionality at 780 nm.

Quantum synchronization of a driven self-sustained oscillator (2014)
Journal Article
Walter, S., Nunnenkamp, A., & Bruder, C. (2014). Quantum synchronization of a driven self-sustained oscillator. Physical Review Letters, 112, Article 094102. https://doi.org/10.1103/PhysRevLett.112.094102

Synchronization is a universal phenomenon that is important both in fundamental studies and in technical applications. Here we investigate synchronization in the simplest quantum-mechanical scenario possible, i.e., a quantum-mechanical self-sustained... Read More about Quantum synchronization of a driven self-sustained oscillator.

Sequestering the standard model vacuum energy (2014)
Journal Article
Kaloper, N., & Padilla, A. (2014). Sequestering the standard model vacuum energy. Physical Review Letters, 112(9), Article 091304. https://doi.org/10.1103/PhysRevLett.112.091304

We propose a very simple reformulation of general relativity, which completely sequesters from gravity all of the vacuum energy from a matter sector, including all loop corrections and renders all contributions from phase transitions automatically sm... Read More about Sequestering the standard model vacuum energy.

Evolution of semilocal string networks: large-scale properties (2014)
Journal Article
Achúcarro, A., Avgoustidis, A., Leite, A., Lopez-Eiguren, A., Martins, C., Nunes, A., & Urrestilla, J. (2014). Evolution of semilocal string networks: large-scale properties. Physical Review D, 89(6), Article 063503. https://doi.org/10.1103/PhysRevD.89.063503

We report on a detailed numerical study of the evolution of semilocal string networks, based on the largest and most accurate field theory simulations of these objects to date. We focus on the large-scale network properties, confirming earlier indica... Read More about Evolution of semilocal string networks: large-scale properties.

An antidamping spin–orbit torque originating from the Berry curvature (2014)
Journal Article
Kurebayashi, H., Sinova, J., Fang, D., Irvine, A. C., Skinner, T. D., Wunderlich, J., …Jungwirth, T. (2014). An antidamping spin–orbit torque originating from the Berry curvature. Nature Nanotechnology, 9(3), 211-217. https://doi.org/10.1038/nnano.2014.15

Magnetization switching at the interface between ferromagnetic and paramagnetic metals, controlled by current-induced torques, could be exploited in magnetic memory technologies. Compelling questions arise regarding the role played in the switching b... Read More about An antidamping spin–orbit torque originating from the Berry curvature.

Spin-symmetry conversion in methyl rotors induced by tunnel resonance at low temperature (2014)
Journal Article
Zhang, B., Sun, C., Alsanoosi, A. M., Aibout, A., & Horsewill, A. J. (2014). Spin-symmetry conversion in methyl rotors induced by tunnel resonance at low temperature. Journal of Chemical Physics, 140(8), https://doi.org/10.1063/1.4865835

Field-cycling NMR in the solid state at low temperature (4.2 K) has been employed to measure the tunneling spectra of methyl (CH3) rotors in phenylacetone and toluene. The phenomenon of tunnel resonance reveals anomalies in 1H magnetization from whic... Read More about Spin-symmetry conversion in methyl rotors induced by tunnel resonance at low temperature.

Steady-state properties of a driven atomic ensemble with nonlocal dissipation (2014)
Journal Article
Yu, D., Olmos, B., Lesanovsky, I., OLMOS SANCHEZ, B., & YU, D. (2014). Steady-state properties of a driven atomic ensemble with nonlocal dissipation. Physical Review A, 89(2), doi:10.1103/physreva.89.023616

In a driven dense ensemble of two-level atoms the decay acts in a correlated way on several atoms simultaneously. The competition between the coherent laser excitation and the dipole-dipole interaction induced by the dissipation gives rise to a bimod... Read More about Steady-state properties of a driven atomic ensemble with nonlocal dissipation.

Spin dynamic simulations of solid effect DNP: the role of the relaxation superoperator (2014)
Journal Article
Karabanov, A., Kwiatkowski, G., & Köckenberger, W. (2014). Spin dynamic simulations of solid effect DNP: the role of the relaxation superoperator. Molecular Physics, 112(14), https://doi.org/10.1080/00268976.2014.884287

Relaxation plays a crucial role in the spin dynamics of dynamic nuclear polarisation. We review here two different strategies that have recently been used to incorporate relaxation in models to predict the spin dynamics of solid effect dynamic nuclea... Read More about Spin dynamic simulations of solid effect DNP: the role of the relaxation superoperator.

Imperfections in a two-dimensional hierarchical structure (2014)
Journal Article
Rayneau-Kirkhope, D., Mao, Y., & Farr, R. (2014). Imperfections in a two-dimensional hierarchical structure. Physical Review E, 89(2), Article 023201. https://doi.org/10.1103/PhysRevE.89.023201

Hierarchical and fractal designs have been shown to yield high mechanical efficiency under a variety of loading conditions. Here a fractal frame is optimized for compressive loading in a two-dimensional space. We obtain the dependence of volume requi... Read More about Imperfections in a two-dimensional hierarchical structure.

XeNA: An automated ‘open-source’ 129Xe hyperpolarizer for clinical use (2014)
Journal Article
Nikolaou, P., Coffey, A. M., Walkup, L. L., Gust, B. M., Whiting, N., Newton, H., …Goodson, B. M. (2014). XeNA: An automated ‘open-source’ 129Xe hyperpolarizer for clinical use. Magnetic Resonance Imaging, 32(5), 541-550. https://doi.org/10.1016/j.mri.2014.02.002

Here we provide a full report on the construction, components, and capabilities of our consortium’s “open-source” large-scale (~ 1 L/h) 129Xe hyperpolarizer for clinical, pre-clinical, and materials NMR/MRI (Nikolaou et al., Proc. Natl. Acad. Sci. US... Read More about XeNA: An automated ‘open-source’ 129Xe hyperpolarizer for clinical use.

Spin-orbit torque opposing the Oersted torque in ultrathin Co/Pt bilayers (2014)
Journal Article
Skinner, T., Wang, M., Hindmarch, A., Rushforth, A., Irvine, A., Heiss, D., …Ferguson, A. (in press). Spin-orbit torque opposing the Oersted torque in ultrathin Co/Pt bilayers. Applied Physics Letters, 104(6), Article 062401. https://doi.org/10.1063/1.4864399

Current-induced torques in ultrathin Co/Pt bilayers were investigated using an electrically driven ferromagnetic resonance technique. The angle dependence of the resonances, detected by a rectification effect as a voltage, was analysed to determine t... Read More about Spin-orbit torque opposing the Oersted torque in ultrathin Co/Pt bilayers.

Fabrication and atomic structure of size-selected, layered MoS2 clusters for catalysis (2014)
Journal Article
Cuddy, M. J., Arkill, K. P., Wang, Z. W., Komsa, H., Krasheninnikov, A. V., & Palmer, R. E. (2014). Fabrication and atomic structure of size-selected, layered MoS2 clusters for catalysis. Nanoscale, 6(21), 12463-12469. doi:10.1039/c4nr04317k

Well defined MoS2 nanoparticles having a layered structure and abundant edges would be of considerable interest for applications including photocatalysis. We report the atomic structure of MoS2 size-selected clusters with mass in a range all the way... Read More about Fabrication and atomic structure of size-selected, layered MoS2 clusters for catalysis.

Caught in the act: cluster 'k+a' galaxies as a link between spirals and S0s (2014)
Journal Article
Rodriguez Del Pino, B., Bamford, S. P., Aragón-Salamanca, A., Milvang-Jensen, B., Merrifield, M. R., & Balcells, M. (2014). Caught in the act: cluster 'k+a' galaxies as a link between spirals and S0s. Monthly Notices of the Royal Astronomical Society, 438(2), https://doi.org/10.1093/mnras/stt2202

We use integral field spectroscopy of 13 disc galaxies in the cluster AC114 at z ∼ 0.31 in an attempt to disentangle the physical processes responsible for the transformation of spiral galaxies in clusters. Our sample is selected to display a dominan... Read More about Caught in the act: cluster 'k+a' galaxies as a link between spirals and S0s.

Effectiveness of 0.05% oxymetazoline (Vicks Sinex Micromist) nasal spray in the treatment of objective nasal congestion demonstrated to 12h post-administration by magnetic resonance imaging (2014)
Journal Article
Pritchard, S. E., Glover, M., Guthrie, G., Brum, J., Ramsey, D., Kappler, G., …Gowland, P. A. (2014). Effectiveness of 0.05% oxymetazoline (Vicks Sinex Micromist) nasal spray in the treatment of objective nasal congestion demonstrated to 12h post-administration by magnetic resonance imaging. Pulmonary Pharmacology and Therapeutics, 27(1), https://doi.org/10.1016/j.pupt.2013.08.002

Introduction: This study aimed to assess the qualitative and quantitative utility of MRI imaging to illustrate the magnitude and duration of the effect of a standard 100 ?g dose of oxymetazoline in a commercially available formulation that also cont... Read More about Effectiveness of 0.05% oxymetazoline (Vicks Sinex Micromist) nasal spray in the treatment of objective nasal congestion demonstrated to 12h post-administration by magnetic resonance imaging.

Room-temperature antiferromagnetic memory resistor (2014)
Journal Article
Marti, X., Fina, I., Frontera, C., Liu, J., Wadley, P., He, Q., …Ramesh, R. (2014). Room-temperature antiferromagnetic memory resistor. Nature Materials, 13(4), 367-374. https://doi.org/10.1038/nmat3861

The bistability of ordered spin states in ferromagnets provides the basis for magnetic memory functionality. The latest generation of magnetic random access memories rely on an efficient approach in which magnetic fields are replaced by electrical me... Read More about Room-temperature antiferromagnetic memory resistor.

Subhaloes gone Notts: the clustering properties of subhaloes (2014)
Journal Article
Pujol, A., Gaztanaga, E., Giocoli, C., Knebe, A., Pearce, F. R., Skibba, R. A., …Tweed, D. (2014). Subhaloes gone Notts: the clustering properties of subhaloes. Monthly Notices of the Royal Astronomical Society, 438(4), https://doi.org/10.1093/mnras/stt2446

We present a study of the substructure finder dependence of subhalo clustering in the Aquarius Simulation. We run 11 different subhalo finders on the haloes of the Aquarius Simulation and study their differences in the density profile, mass fraction... Read More about Subhaloes gone Notts: the clustering properties of subhaloes.

A dynamic model of the eye nystagmus response to high magnetic fields (2014)
Journal Article
Glover, P. M., Li, Y., Antunes, A., Mian, O. S., & Day, B. L. (2014). A dynamic model of the eye nystagmus response to high magnetic fields. Physics in Medicine and Biology, 59(3), https://doi.org/10.1088/0031-9155/59/3/631

It was recently shown that high magnetic fields evoke nystagmus in human subjects with functioning vestibular systems. The proposed mechanism involves interaction between ionic currents in the endolymph of the vestibular labyrinth and the static magn... Read More about A dynamic model of the eye nystagmus response to high magnetic fields.