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Coulomb Blockade Oscillations as a Noninvasive Probe of Screening
R. Nemutudi,C. G. Smith,C.-T. Liang,D. A. Ritchie,G. A. C. Jones,I. Farrer,M. Pepper,M. J. Murphy 한국물리학회 2006 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.48 No.6
Noninvasive measurement techniques utilize the fact that the local conditions in an electrical circuit can affect a nearby, but electrically isolated circuit. Such a technique can be used to measure the screening ability of an electron system. In this work, we study non-invasively the screening characteristics of a one-dimensional (1D) channel in close lateral proximity to a quantum dot that forms a separate and electrically isolated circuit. We use a one-dimensional (1D) channel to screen and in-plane electric field between the gate and the lateral quantum dot. The Coulomb blockade oscillations we observe through the quantum dot circuit and the corresponding variation in their periodicity at different gate voltage regions are a signature of the screening characteristics of a 1D channel both at zero magnetic field and in the quantum Hall region. The screening ability of the 1D channel is found to be approximately two orders of magnitude smaller than that of an ungated GaAs two-dimensional electron system.
The HadGEM2-ES implementation of CMIP5 centennial simulations
Jones, C. D.,Hughes, J. K.,Bellouin, N.,Hardiman, S. C.,Jones, G. S.,Knight, J.,Liddicoat, S.,O&,apos,Connor, F. M.,Andres, R. J.,Bell, C.,Boo, K.-O.,Bozzo, A.,Butchart, N.,Cadule, P.,Corbin, K. D. Copernicus GmbH 2011 Geoscientific model development Vol.4 No.3
<P><p><strong>Abstract.</strong> The scientific understanding of the Earth's climate system, including the central question of how the climate system is likely to respond to human-induced perturbations, is comprehensively captured in GCMs and Earth System Models (ESM). Diagnosing the simulated climate response, and comparing responses across different models, is crucially dependent on transparent assumptions of how the GCM/ESM has been driven - especially because the implementation can involve subjective decisions and may differ between modelling groups performing the same experiment. This paper outlines the climate forcings and setup of the Met Office Hadley Centre ESM, HadGEM2-ES for the CMIP5 set of centennial experiments. We document the prescribed greenhouse gas concentrations, aerosol precursors, stratospheric and tropospheric ozone assumptions, as well as implementation of land-use change and natural forcings for the HadGEM2-ES historical and future experiments following the Representative Concentration Pathways. In addition, we provide details of how HadGEM2-ES ensemble members were initialised from the control run and how the palaeoclimate and AMIP experiments, as well as the 'emission-driven' RCP experiments were performed.</p> </P>
Structure ofSn107studied through single-neutron knockout reactions
Cerizza, G.,Ayres, A.,Jones, K. L.,Grzywacz, R.,Bey, A.,Bingham, C.,Cartegni, L.,Miller, D.,Padgett, S.,Baugher, T.,Bazin, D.,Berryman, J. S.,Gade, A.,McDaniel, S.,Ratkiewicz, A.,Shore, A.,Stroberg, S American Physical Society 2016 Physical Review C Vol.93 No.2
<P>The neutron-deficient nucleus Sn-107 has been studied by using the one-neutron knockout reaction. By measuring the decay gamma rays and momentum distributions of reaction residues, the spins of the ground, 5/2(+), and first-excited, 7/2(+), states of Sn-107 have been assigned by comparisons to eikonal-model reaction calculations. Limits on the inclusive and exclusive cross sections have been measured and transitions due to neutron removals from below the N = 50 closed shell have been observed. New excited states up to 5.5 MeV in Sn-107 have been identified.</P>
Measurement of the Electron-Antineutrino Angular Correlation in Neutron β Decay
Darius, G.,Byron, W. A.,DeAngelis, C. R.,Hassan, M. T.,Wietfeldt, F. E.,Collett, B.,Jones, G. L.,Dewey, M. S.,Mendenhall, M. P.,Nico, J. S.,Park, H.,Komives, A.,Stephenson, E. J. American Physical Society 2017 Physical Review Letters Vol.119 No.4
The cages, dynamics, and structuring of incipient methane clathrate hydrates
Walsh, Matthew R.,Rainey, J. Daniel,Lafond, Patrick G.,Park, Da-Hye,Beckham, Gregg T.,Jones, Michael D.,Lee, Kun-Hong,Koh, Carolyn A.,Sloan, E. Dendy,Wu, David T.,Sum, Amadeu K. Royal Society of Chemistry 2011 Physical chemistry chemical physics Vol.13 No.44
<P>Interest in describing clathrate hydrate formation mechanisms spans multiple fields of science and technical applications. Here, we report findings from multiple molecular dynamics simulations of spontaneous methane clathrate hydrate nucleation and growth from fully demixed and disordered two-phase fluid systems of methane and water. Across a range of thermodynamic conditions and simulation geometries and sizes, a set of seven cage types comprises approximately 95% of all cages formed in the nucleated solids. This set includes the ubiquitous 5<SUP>12</SUP> cage, the 5<SUP>12</SUP>6<SUP><I>n</I></SUP> subset (where <I>n</I> ranges from 2–4), and the 4<SUP>1</SUP>5<SUP>10</SUP>6<SUP><I>n</I></SUP> subset (where <I>n</I> also ranges from 2–4). Transformations among these cages occur <I>via</I> water pair insertions/removals and rotations, and may elucidate the mechanisms of solid–solid structural rearrangements observed experimentally. Some consistency is observed in the relative abundance of cages among all nucleation trajectories. 5<SUP>12</SUP> cages are always among the two most abundant cage types in the nucleated solids and are usually the most abundant cage type. In all simulations, the 5<SUP>12</SUP>6<SUP><I>n</I></SUP> cages outnumber their 4<SUP>1</SUP>5<SUP>10</SUP>6<SUP><I>n</I></SUP> counterparts with the same number of water molecules. Within these consistent features, some stochasticity is observed in certain cage ratios and in the long-range ordering of the nucleated solids. Even when comparing simulations performed at the same conditions, some trajectories yield swaths of multiple adjacent sI unit cells and long-range order over 5 nm, while others yield only isolated sI unit cells and little long-range order. The nucleated solids containing long-range order have higher 5<SUP>12</SUP>6<SUP>2</SUP>/5<SUP>12</SUP> and 5<SUP>12</SUP>6<SUP>3</SUP>/4<SUP>1</SUP>5<SUP>10</SUP>6<SUP>2</SUP> cage ratios when compared to systems that nucleate with little long-range order. The formation of multiple adjacent unit cells of sI hydrate at high driving forces suggests an alternative or addition to the prevailing hydrate nucleation hypotheses which involve formation through amorphous intermediates.</P> <P>Graphic Abstract</P><P>The dominant cages of clathrates are classified and the formation of multiple sI unit cells is reported from large-scale simulations. <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=c1cp21899a'> </P>
S.A. Jones,G. Laskaris,S. Vincent-Bonnieu,R. Farajzadeh,W.R. Rossen 한국공업화학회 2016 Journal of Industrial and Engineering Chemistry Vol.37 No.-
We present a comparative study of foam coreflood experiments with various surfactant concentrations. Plots of apparent viscosity vs. injected gas fraction were obtained for surfactant concentrations at thecritical micelle concentration and above. Bulk foam stability was measured for all concentrations andcompared with the coreflood results. There were different responses to surfactant concentration in bulkand in corefloods. The coreflood results were matched with an implicit-texture foam model, and the dependency of themodel parameters on the surfactant concentration is discussed. Fitting the data requires relating thesurfactant concentration to the dry-out function or the limiting capillary pressure.
Informing direct neutron capture on tin isotopes near the N=82 shell closure
Manning, B.,Arbanas, G.,Cizewski, J. A.,Kozub, R. L.,Ahn, S.,Allmond, J. M.,Bardayan, D. W.,Chae, K. Y.,Chipps, K. A.,Howard, M. E.,Jones, K. L.,Liang, J. F.,Matos, M.,Nesaraja, C. D.,Nunes, F. M.,O'M American Physical Society 2019 Physical Review C Vol.99 No.4