230 Works

Kondo screening in a charge-insulating spinon metal [dataset]

Matjaž Gomilšek, Rok Žitko, Martin Klanjšek, Martin Pregelj, Christopher Baines, Yuesheng Li, Qingming Zhang & Andrej Zorko
The Kondo effect, an eminent manifestation of many-body physics in condensed matter, is traditionally explained as exchange scattering of conduction electrons on a spinful impurity in a metal. The resulting screening of the impurity's local moment by the electron Fermi sea is characterized by a Kondo temperature TK, below which the system enters a strongly-coupled regime. In recent years, this effect has found its realizations beyond the bulk-metal paradigm in many other conduction-electron systems, such...

Transverse field muon-spin rotation signature of the skyrmion-lattice phase in Cu2OSeO3

Tom Lancaster
We present the results of transverse field (TF) muon-spin rotation measurements on Cu2OSeO3, which has a skyrmion lattice (SL) phase.

Self-Supervised Image Classification [dataset]

Patrice Carbonneau
This collection contains data and models for the Self-Supervised Classification workflow. Further information, and Python code, can be found in this GitHub repository: https://github.com/geojames/Self-Supervised-Classification

Research data for "Structure and Physicochemical Characterisation of a Naproxen-Picolinamide Cocrystal"

Hannah E. Kerr
Naproxen (NPX) is a nonsteroidal anti-inflammatory drug with pain- and fever- relieving properties, currently marketed in the sodium salt form to overcome solubility problems; however, alternative solutions for improving its solubility across all pH values are desirable. NPX is suitable for cocrystal formation, with hydrogen-bonding possibilities via the COOH group. The crystal structure is presented of a 1:1 cocrystal of NPX with picolinamide as a coformer. The pharmaceutically relevant physical properties were investigated and the...

Thesis supplementary data: Laser cooling and optical trapping of Ytterbium

Stefan Kemp
This thesis presents the development of an experimental apparatus designed to investigate the ultracold collisional properties for mixtures of Cs and Yb, with a long-term view to the creation of ultracold CsYb molecules via indirect cooling methods. The unpaired electron spin that is inherent to molecules of this form gives rise to a magnetic dipole moment in addition to a ground state electric dipole moment. This enables extra control over molecular interactions and should enable...

Relating Molecular Morphology to Charge Mobility in Semi-Crystalline Conjugated Polymers: Underpinning data

Matthew Jones, Buddhapriya Charkrabarti & David Huang
The dataset.zip file contains four sets of data used in the Journal of Physical Chemistry paper to which this DOI is linked. These are - Crystal data; Charge transport data; charge transport input data (morphologies); paracrystallinity data. Each sub directory contains a short .txt file to assist interpreting the data.

Supporting data: Measurement of the binding energy of ultracold 87Rb133Cs molecules using an offset-free optical frequency comb

Peter K. Molony
Data for the above publication, and Excel spreadsheets of the main analysis and error calculations.

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

Sarah Hyland & James Bisset
Data listing all articles and conference papers published by a Durham author acknowledging RCUK funding between August 2015 and July 2016, which met the RCUK Open Access policy requirements via the Green OA route.

Controlling fragment competition on pathways to addressable self-assembly [dataset]

Jim Madge, Mark A. Miller & David Bourne
Addressable self-assembly is the formation of a target structure from a set of unique molecular or colloidal building-blocks, each of which occupies a defined location in the target. The requirement that each type of building-block appears exactly once in each copy of the target introduces severe restrictions on the combinations of particles and on the pathways that lead to successful self-assembly. These restrictions can limit the efficiency of self-assembly and the final yield of the...

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...

Data for "Driven-dissipative many-body systems with mixed power-law interactions: Bistabilities and temperature-driven nonequilibrium phase transitions"

Nikola Šibalić
We investigate the nonequilibrium dynamics of a driven-dissipative spin ensemble with competing power-law interactions. We demonstrate that dynamical phase transitions as well as bistabilities can emerge for asymptotic van der Waals interactions, but critically rely on the presence of a slower decaying potential core. Upon introducing random particle motion, we show that a finite gas temperature can drive a phase transition with regards to the spin degree of freedom and eventually leads to mean-field behavior...

Supporting data: "The role of transition radiation in cathodoluminescence imaging and spectroscopy of thin-foils"

Budhika Mendis
There is renewed interest in cathodoluminescence (CL) in the transmission electron microscope, since it can be combined with low energy loss spectroscopy measurements and can also be used to probe defects, such as grain boundaries and dislocations, at high spatial resolution. Transition radiation (TR), which is emitted when the incident electron crosses the vacuum-specimen interface, is however an important artefact that has received very little attention. The importance of TR is demonstrated on a wedge...

Observation of interference effects via four photon excitation of highly excited Rydberg states in thermal cesium vapor (Data files)

Jorge M. Kondo, Nikola Šibalić, Alex Guttridge, Christopher G. Wade, Natalia R. De Melo, Charles S. Adams & Kevin J. Weatherill
We report on the observation of Electromagnetically Induced Transparency (EIT) and Absorption (EIA) of highly-excited Rydberg states in thermal Cs vapor using a 4-step excitation scheme. The advantage of this 4-step scheme is that the final transition to the Rydberg state has a large dipole moment and one can achieve similar Rabi frequencies to 2 or 3 step excitation schemes using two orders of magnitude less laser power. Consequently each step is driven by a...

Real-time traversable surface detection by colour space fusion and temporal analysis - Evaluation Dataset

Toby P. Breckon & Ioannis Katramados
Data set from research paper: Real-Time Traversable Surface Detection by Colour Space Fusion and Temporal Analysis (I. Katramados, S. Crumpler, T.P. Breckon), In Proc. International Conference on Computer Vision Systems, Springer, Volume 5815, pp. 265-274, 2009. Previously released (2009-2015) as zip file download from personal web page of the authors (Katramados / Breckon).

Supporting Information for Zeeman-tunable Modulation Transfer Spectroscopy [design file]

Chloe So
Active frequency stabilization of a laser to an atomic or molecular resonance underpins many modern-day AMO physics experiments. With a flat background and high signal-to-noise ratio, modulation transfer spectroscopy (MTS) offers an accurate and stable method for laser locking. Despite its benefits, however, the four-wave mixing process that is inherent to the MTS technique entails that the strongest modulation transfer signals are only observed for closed transitions, excluding MTS from numerous applications. Here, we report...

Data archive for Chem Comm paper | Furosemide's one little hydrogen atom: NMR crystallography structure verification of powdered molecular organics

Cory Widdifield
The potential of NMR crystallography to verify molecular crystal structures deposited in structural databases is evaluated, with two structures of the pharmaceutical furosemide serving as examples. While the structures differ in the placement of one H atom, using this approach, we verify one of the structures in the Cambridge Structural Database using quantitative tools, while establishing that the other structure does not meet the verification criteria.

Data Supporting "Interfacial Structure Dependent Spin Mixing Conductance in Cobalt Thin Films", Physical Review Letters 115, 056601 (2015)

Mustafa Tokac, Sergiy Bunyaev, Gleb Kakazei, David Schmool, Del Atkinson & Aidan Hindmarch
Enhancement of Gilbert damping in polycrystalline cobalt thin-film multilayers of various thicknesses, overlayered with copper or iridium, was studied in order to understand the role of local interface structure in spinpumping. X-ray diffraction indicates that cobalt films less than 6 nm thick have strong fcc(111) texture while thicker films are dominated by hcp(0001) structure. The intrinsic damping for cobalt thicknesses above 6 nm is weakly dependent on cobalt thickness for both overlayer materials, and below...

Computing small pivot-minors [software]

Konrad K. Dabrowski
A graph G contains a graph H as a pivot-minor if H can be obtained from G by applying a sequence of vertex deletions and edge pivots. Pivot-minors play an important role in the study of rank-width. However, so far, pivot-minors have only been studied from a structural perspective. In the associated paper, we initiate a systematic study into their complexity aspects. We first prove that the Pivot-Minor problem, which asks if a given graph...

Elucidation of the helical spin structure of FeAs

Tom Lancaster, R. Schoonmaker, S.H. Lee, C.-H. Du, P. Steadman, J. Strempfer, Kh. A. Ziq, S.J. Clark, P.D. Hatton & T. Frawley
We present the results of resonant x-ray scattering measurements and electronic structure calculations on the monoarsenide FeAs. We elucidate details of the magnetic structure, showing the ratio of ellipticity of the spin helix is larger than previously thought, at 2.58(3), and reveal both a right-handed chirality and an out-of-plane component of the magnetic moments in the spin helix. We find that electronic structure calculations and analysis of the spin-orbit interaction are able to qualitatively account...

Managing and sharing research data, a training course : 13 March 2019 [other]

Nicholas Syrotiuk & James Bisset
Slides available on Prezi.com until we pay to download them in a proprietary file format: https://prezi.com/p/x5sovu3qh1ud/

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.

Increased Lifetime of Metastable Skyrmions by Controlled Doping [dataset]

Thomas Birch
Previous observations of metastable magnetic skyrmions have shown that close to the equilibrium pocket the metastable state has a short lifetime, and therefore rapid cooling is required to generate a signi cant skyrmion population at low temperatures. Here, we report that the lifetime of metastable skyrmions in crystals of Cu2OSeO3 is extended by a factor of 50 with the introduction of only 2.5% zinc doping, allowing over 50% of the population to survive when eld-cooling...

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