222 Works

Topological properties of a dense atomic lattice gas [dataset]

Robert J. Bettles, Jiri Minar, Charles S. Adams, Igor Lesanovsky & Beatriz Olmos
We investigate the existence of topological phases in a dense two-dimensional atomic lattice gas. The coupling of the atoms to the radiation field gives rise to dissipation and a nontrivial coherent long-range exchange interaction whose form goes beyond a simple power law. The far-field terms of the potential—which are particularly relevant for atomic separations comparable to the atomic transition wavelength—can give rise to energy spectra with one-sided divergences in the Brillouin zone. The long-ranged character...

Segments of straws [dataset]

Zhenning Liu
Each row of the file represents one segment. The first two columns are x-coordinates and y-coordinates of beginning points of each segment and the third, fourth columns are coordinates of endpoints. The fifth and sixth columns are m and b values of the straight line function y=mx+b of segments.

Atomic Faraday filter with equivalent noise bandwidth less than 1 GHz: Data

M. A. Zentile, J. Keaveney, D. J. Whiting, C. S. Adams & I. G. Hughes
Filter spectra and optimisation results

Optimisation of the coherence transfer delay in PSYCOSY experiments [dataset]

Alan Kenwright
We investigate by a combination of experimental measurements, Fokker-Planck theory simulations, and analytical predictions, the coherence evolution delay necessary in PSYCOSY experiments to ensure discrimination in favour of the larger correlations typically arising from short range (nJ, n<=3) 1H-1H couplings, and show that in general a coherence evolution delay of around 30 ms is optimum.

Two-photon photoassociation spectroscopy of CsYb: ground-state interaction potential and interspecies scattering lengths [dataset]

Alexander Guttridge
Data files used in the publication "Two-photon photoassociation spectroscopy of CsYb: ground-state interaction potential and interspecies scattering lengths"

Finding spin-glass ground states using quantum walks [dataset]

Adam Callison
This file contains the numerical data supporting the numerical data supporting arXiv:1903.05003, the abstract used here is the abstract of that paper.

Supporting Data for Pharmaceutical Polymorph Control in a Drug-Mimetic Supramolecular Gel

Jonathan A. Foster, Krishna K. Damodaran, Antoine Maurin, Graeme M. Day, Hugh P. G. Thompson, Gary S. Cameron, Jenifer Cuestra & Jonathan W. Steed
We report the synthesis of a bis(urea) gelator designed to specifically mimic the chemical structure of the highly polymorphic drug substance ROY. Crystallization of ROY from toluene gels of this gelator results in the formation of the metastable red form instead of the thermodynamic yellow polymorph. In contrast, all other gels and solution control experimetns give the yellow form. Conformational and crystal structure prediction methods have been used to propose the structure of the gel...

Durham RCUK Open Access Data Year 5 (Apr2017-Mar2018)

James Bisset & Sarah Hyland
Data on compliance of Durham publications with RCUK Open Access policy, including APC spend from the RCUK block grant. Year 5: April 1st 2017 to March 31st 2018

Substrate-Independent Epitaxial Growth of the Metal–Organic Framework MOF-508a. [dataset]

Matthew Wilson
Plasmachemical deposition is a substrate-independent method for the conformal surface functionalization of solid substrates. Structurally well-defined pulsed plasma deposited poly(1-allylimidazole) layers provide surface imidazole linker groups for the directed liquid-phase epitaxial (layer-by-layer) growth of metal–organic frameworks (MOFs) at room temperature. For the case of microporous [Zn (benzene-1,4-dicarboxylate)-(4,4′-bipyridine)0.5] (MOF-508), the MOF-508a polymorph containing two interpenetrating crystal lattice frameworks undergoes orientated Volmer–Weber growth and displays CO2 gas capture behavior at atmospheric concentrations in proportion to the number...

Quantum magnetism in molecular spin ladders probed with muon-spin spectroscopy [dataset]

Tom Lancaster, Fan Xiao, Ben Huddart, Robert Williams, Francis Pratt, Blundell, Stephen, , Stewart Clark, Robert Scheuermann, Tatsuo Goko, Simon Ward, Jamie Manson, Christian Ruegg & Karl Kramer
We present the results of muon-spin spectroscopy (μ+SR) measurements on the molecular spin ladder system (Hpip)2CuBr4(1−x)Cl4x, [Hpip=(C5H12N)]. Using transverse field μ+SR we are able to identify characteristic behaviour in each of the regions of the phase diagram of the x=0 strong-rung spin ladder system (Hpip)2CuBr4. Comparison of our results to those of the dimer-based molecular magnet Cu(pyz)(gly)(ClO4) shows several common features. We locate the crossovers in partially disordered (Hpip)2CuBr4(1−x)Cl4x (x=0.05), where a region of behaviour...

Fast native-MATLAB stiffness assembly for SIPG linear elasticity

R. Bird, W.M. Coombs & S. Giani
When written in MATLAB the finite element method (FEM) can be implemented quickly and with significantly fewer lines, when compared to compiled code. MATLAB is also an attractive environment for generating bespoke routines for scientific computation as it contains a library of easily accessible inbuilt functions, effective debugging tools and a simple syntax for generating scripts. However, there is a general view that MATLAB is too inefficient for the analysis of large problems. Here this...

Direct loading of a large Yb MOT on the 1S0 → 3P1 transition(Data Files)

Alex Guttridge, Stephen Hopkins, Stefan Kemp, Danielle Boddy, Ruben Freytag, Matthew Jones, Michael Tarbutt, Ed Hinds & Simon Cornish
Data files used in "Fluorescence spectroscopy of an ytterbium atomic beam". For more information refer to the README.txt file included in data zip file.

Durham RCUK Open Access Data Year 3 (Aug2015-Jul2016)

James Bisset, Sarah Hyland & Frederick W. F. Foulds
Data on compliance of Durham publications with RCUK Open Access policy, including APC spend from the RCUK block grant. Year 3: August 1st 2015 to July 31st 2016

Imposition of essential boundary conditions in the material point method (figure data)

Michael Cortis, Charles Augarde, William Coombs, Scott Robinson, Andrews Brennan & Michael Brown
There is increasing interest in the Material Point Method (MPM) as a means of modelling solid mechanics problems in which very large deformations occur, e.g. in the study of landslides and metal forming, however some aspects vital to wider use of the method have to date been ignored, in particular methods for imposing essential boundary conditions in the case where the problem domain boundary does not coincide with the background grid element edges. In this...

ElecSus: extension to arbitrary geometry magneto-optics [dataset and software]

James Keaveney, Charles Adams & Ifan Hughes
An alternative to the GitHub repositories for the ElecSus codes and test data, also available at https://github.com/jameskeaveney/ElecSus and https://github.com/jameskeaveney/ElecSusTestData

Rydberg-Dressed Magneto-Optical Trap [dataset]

N. C. Jackson, A.D. Bounds, R.K. Hanley, R. Faoro, E.M. Bridge, P. Huillery & M. P. A. Jones
Data supporting the publication "Rydberg-Dressed Magneto-Optical Trap". Contains data for each of the Figures 1-5 shown in the main text.

Brownfield land dataset

Clare Bambra, Steve Robertson, Adetayo Kasim, Joe Smith, Jo Cairns, Alison Copeland, Nina Finlay & Karen Johnson
This dataset contains the relative proportion of brownfield land (or previously developed land) at Census Statistical Ward Level in England taken from 2009 National Land Use Database, age and sex standardised morbidity (from 2001 UK Census) and age and sex standardised all-cause premature mortality (below 75 years) from the Office for National Statistics (1998-2003)

Pretrained Neural Network Models for Guo 2018 study - TensorFlow format

Tiancheng Guo
The presence of raindrop induced image distortion has a significant negative impact on the performance of a wide range of all-weather visual sensing applications including within the increasingly important contexts of visual surveillance and vehicle autonomy. A key part of this problem is robust raindrop detection such that the potential for performance degradation in effected image regions can be identified. Here we address the problem of raindrop detection in colour video imagery by considering three...

Data for "Dressed-state electromagnetically induced transparency for light storage in uniform phase spin-waves"

Nikola Šibalić
We present, experimentally and theoretically, a scheme for dressed-state electromagnetically induced transparency (EIT) in a three-step cascade system where a four-level system is mapped into an effective three-level system. Theoretical analysis reveals that the scheme provides coherent state control via adiabatic following and provides a generalized protocol for light storage in uniform phase spin-waves that are insensitive to motional dephasing. The three-step driving enables a number of other features including spatial selectivity of the excitation...

Magnetic phases of skyrmion-hosting GaV4S8−ySey ( y = 0, 2, 4, 8) probed with muon spectroscopy [dataset]

Tom Lancaster, Kévin Franke, Benjamin Huddart, Thomas Hicken, Fan Xiao, Stephen Blundell, Francis Pratt, Joel Barker, Stewart Clark, Ales Stefancic, Monica Ciomaga Hatnean & Geetha Balakrishnan
We present the results of a muon-spin spectroscopy investigation of GaV4S8−ySey with y=0,2,4, and 8. Zero-field measurements suggest that GaV4Se8 and GaV4S8 have distinct magnetic ground states, with the latter material showing an anomalous temperature dependence of the local magnetic field. It is not possible to evolve the magnetic state continuously between these two systems, with the intermediate y=2 and 4 materials showing glassy magnetic behavior at low temperature. The skyrmion lattice (SkL) phase is...

Data Supporting 'Understanding the role of damping and Dzyaloshinskii-Moriya interaction on dynamic domain wall behaviour in platinum-ferromagnet nanowires', Scientific Reports 7: 4569 (2017)

A.T. Hindmarch
(Abstract from article) Heavy metal layers, exemplified by Pt, are known to play a significant role in the magnetization behaviour of thin-film ferromagnets by three distinct mechanisms that can each contribute to the reversal process. These include modifying the local magnetization state via an interfacial Dzyaloshinskii-Moriya interaction (IDMI), enhancement of the damping, via d-d hybridisation and spin-pumping across the interface, and the mediation of the magnetization switching, with the flow of current through a system,...

Generalized Dynamic Object Removal for Dense Stereo Vision Based Scene Mapping using Synthesised Optical Flow - Evaluation Dataset

O.K. Hamilton & Toby P. Breckon
Mapping an ever changing urban environment is a challenging task as we are generally interested in mapping the static scene and not the dynamic objects therein, such as cars and people. We propose a novel approach to the problem of dynamic object removal within stereo based scene mapping that is both independent of the underlying stereo approach in use and applicable to varying object motion relative to scene depth and camera motion. By leveraging both...

Examining charge transport networks in organic bulk heterojunction photovoltaic diodes using 1/f noise spectroscopy (data files)

K. Kaku, A.T. Williams, B. Mendis & C. Groves
This study investigates the application of 1/f noise spectroscopy to determine the morphology of organic photovoltaic diodes. Our experiments indicate that 1/f noise spectroscopy can provide detailed information about charge transport networks in such complex, bulk heterojunction devices, even when bipolar charge transport is present. This indicates that 1/f noise spectroscopy could be used to investigate morphology in a wide range blended organic electronic devices. Methodologies and descriptions of the data are described in full...

Research data for "Transverse field muon-spin rotation measurement of the topological anomaly in a thin film of MnSi"

Tom Lancaster, F. Xiao, Z. Salman, I. O. Thomas, S.J. Blundell, F.L. Pratt, S.J. Clark, T. Prokscha, A. Suter, S.L. Zhang, A.A. Baker & T. Hesjedal
We present the results of transverse-field muon-spin rotation measurements on an epitaxially grown 40 nm thick film of MnSi on Si(111) in the region of the field-temperature phase diagram where a skyrmion phase has been observed in the bulk. We identify changes in the quasistatic magnetic field distribution sampled by the muon, along with evidence for magnetic transitions around T ≈ 40 and 30 K. Our results suggest that the cone phase is not the...

Research data for "Testing the limits of NMR crystallography: the case of caffeine–citric acid hydrate"

Hannah E. Kerr
The crystal structure of a new 1:2 caffeine-citric acid hydrate cocrystal is presented. The caffeine molecules are disordered over two positions, with the nature of the disorder confirmed to be static by 13C solid-state NMR. NMR linewidths in statically disordered systems reflect the distribution of local chemical environments, and this study investigates whether the disorder contribution to 13C linewidths can be predicted computationally. The limits of NMR crystallography calculations using density functional theory are tested...

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