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639 results for “spin”
Supporting data for "Hyperfine-phonon spin relaxation in a single-electron GaAs quantum dot"
<p>Supporting data for<br> "Hyperfine-phonon spin relaxation in a single-electron GaAs quantum dot"<br> Leon C. Camenzind, Liuqi Yu, Peter Stano, Jeramy D. Zimmerman, Arthur C. Gossard, Daniel Loss & Dominik M. Zumbühl</p> <p><em>Nature Communications <strong>Volume 9</strong></em>, Article number: 3454 (2018)</p>
The influence of lattice termination on the edge states of the quantum spin Hall insulator monolayer 1T'-WTe_2
<p>We study the influence of sample termination on the electronic properties of the novel quantum spin Hall insulator monolayer 1T'-WTe<sub>2</sub>. For this purpose, we construct an accurate, minimal 4-orbital tight-binding model with spin-orbit coupling by employing a combination of density-functional theory calculations, symmetry considerations, and fitting to experimental data. Based on this model, we compute energy bands and 2-terminal conductance spectra for various ribbon geometries with different terminations, with and without magnetic field.</p> <p>The provided repository contains all code and data to reproduce the results of this study.</p>
Artificial spinning of natural silk threads
<p>Dataset supporting journal publication:</p> <p><strong>Abstract:</strong> Silk producing arthropods spin solid fibres from an aqueous protein feedstock apparently relying on the complex structure of the silk protein and its controlled aggregation by shear forces, alongside biochemical changes. This flow-induced phase-transition of the stored native silk molecules is irreversible, environmentally sound and remarkably energy efficient. The process seemingly relies on a self-assembling, fibrillation process. Here we test this hypothesis by biomimetically spinning a native-based silk feedstock, extracted by custom processes, into silk fibres that equal their natural models’ mechanical properties. Importantly, these filaments, which featured cross-section morphologies ranged from large crescent-like to small ribbon-like shapes, also had the slender cross-sectional areas of native fibres and their hierarchical nanofibrillar structures. The modulation of the post-draw conditions directly affected mechanical properties, correlated with extent of fibre crystallinity, i.e. degree of molecular order. We believe our study contributes significantly to the understanding and development of artificial silks by demonstrating successful biomimetic spinning relies on appropriately designed feedstock properties. In addition, our study provides inspiration for low-energy routes to synthetic polymers.</p> <p>Link: https://www.nature.com/articles/s41598-019-51589-9</p>
Confined dipole and exchange spin waves in a bulk chiral magnet with Dzyaloshinskii-Moriya interaction-Data files
<p>Raw data associated to the manuscript ‘Confined dipole and exchange spin waves in a bulk chiral magnet with Dzyaloshinskii-Moriya interaction.” File formats are described in info.txt files in the concerning folders. For plotting and data evaluation Matlab 2019b and OriginPro 2018b were used. </p> <p>We acknowledge financial support from the Swiss National Science Foundation (SNSF) via Grant No. 171003 Sinergia project Nanoskyrmionics, the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) under Grant No. TRR80 (From Electronic Correlations to Functionality, Project No. 107745057, and Projects No. E1 and No. F7), SPP2137 (Skyrmionics, Project No. 403191981, Grant No. PF393/19), and the excellence cluster MCQST under Germany’s Excellence Strategy EXC-2111 (Project No. 390814868). Financial support by the European Research Council (ERC) through Advanced Grants No. 291079 (TOPFIT) and No. 788031 (ExQuiSid) is gratefully acknowledged.</p> <p>Paper abstract:</p> <p>The Dzyaloshinskii-Moriya interaction (DMI) has an impact on excited spin waves in the chiral magnet Cu<sub>2</sub>OSeO<sub>3</sub> by means of introducing asymmetry in their dispersion relations. The confined eigenmodes of a chiral magnet are hence no longer the conventional standing spin waves. Here we report a combined experimental and micromagnetic modeling study by broadband microwave spectroscopy, and we observe confined spin waves up to eleventh order in bulk Cu<sub>2</sub>OSeO<sub>3</sub> in the field-polarized state. In micromagnetic simulations we find similarly rich spectra. They indicate the simultaneous excitation of both dipole- and exchange-dominated spin waves with wavelengths down to (47.2 ± 0.05) nm attributed to the exchange interaction modulation. Our results suggest the DMI to be effective in creating exchange spin waves in a bulk sample without the challenging nanofabrication and thereby in exploring their scattering with noncollinear spin textures.</p>
Original data sets of a DEER/PELDOR ring test of four doubly spin-labelled mutants of the protein YopO
<p>The dataset is discussed in manuscript "Benchmark test and guidelines for DEER/PELDOR experiments on nitroxide-labeled biomolecules" by Olav Schiemann, Caspar A. Heubach, Dinar Abdullin, Katrin Ackermann, Mykhailo Azarkh, Elena Bagryanskaya, Malte Drescher, Burkhard Endeward, Jack H. Freed, Laura Galazzo, Daniella Goldfarb, Tobias Hett, Laura Esteban Hofer, Luis Fábregas Ibáñez, Eric J. Hustedt, Svetlana Kucher, Ilya Kuprov, Janet E. Lovett, Andreas Meyer, Sharon Ruthstein, Sunil Saxena, Stefan Stoll, Christiane Timmel, Marilena Di Valentin, Hassane S. Mchaourab, Thomas F. Prisner, Bela E. Bode, Enrica Bordignon, Marina Bennati, Gunnar Jeschke. It was generated in a ring test by seven laboratories. The authors names of individual data are not assigned on purpose, rather data sets are referred to by laboratory identifiers A, B, C, D, E, F, G. The Supplementary Information for the above mentioned manuscript, which contains a link to this dataset, describes how the samples were prepared and how the measurements were performed.</p>
Dataset for "Seismological Expression of the Iron Spin Crossover in Ferropericlase in the Earth's Lower Mantle"
<p>The folder contains data related to the publication: Shephard, Houser, Hernlund, Trønnes, Valencia-Cardona, Wentzkovitch (2021) Seismological Expression of the Iron Spin Crossover in Ferropericlase in the Earth’s Lower Mantle. Accepted for publication in Nature Communications.</p> <p>It include numerical grids, a simple plotting script, colour maps, and images (jpg and ps files). There is a README file explaining the content and uses of the these additional data files.</p>
Data for the article "Evidence for spin current driven Bose-Einstein condensation of magnons"
<p>Data for the article "Evidence for spin current driven Bose-Einstein condensation of magnons"</p>
Imaging Spin-Wave Damping Underneath Metals Using Electron Spins in Diamond
<p>Data corresponding to the figures in the main text of "Imaging Spin-Wave Damping Underneath Metals Using<br> Electron Spins in Diamond"</p>
Unravelling the Nature of the Spin Excitations Disentangled from the Charge Contributions in a Doped Cuprate Superconductor
<p>The nature of the spin excitations in superconducting cuprates is a key question toward a unified understanding of the cuprate physics from long-range antiferromagnetism to superconductivity. The intense spin excitations up to the over-doped regime revealed by resonant inelastic X-ray scattering bring new insights as well as problems—like understanding their persistence or their relation to the collective excitations in ordered magnets (magnons). Here, we study the evolution of the spin excitations upon hole-doping the superconducting cuprate Bi<sub>2</sub>Sr<sub>2</sub>CaCu<sub>2</sub>O<sub>8+δ</sub> by disentangling the spin from the charge excitations in the experimental cross section. We compare our experimental results against density matrix renormalization group calculations for a <em>t-J</em>-like model on a square lattice. Our results unambiguously confirm the persistence of the spin excitations, which are closely connected to the persistence of short-range magnetic correlations up to high doping. This suggests that the spin excitations in hole-doped cuprates are related to magnons—albeit short-ranged.</p>
Monte Carlo simulations of octahedral spin ice
<p>Representative datasets for the paper <a href="https://arxiv.org/abs/2203.08834">Fragmented spin ice and multi-k ordering in rare-earth antiperovskites</a>.</p> <p>The contents of each file is as follows:</p> <ul> <li><code>loop.zip</code>: Loop-update simulations of dipolar spin ice</li> <li><code>singlespin.zip</code>: Single-spin-flip simulations of dipolar spin ice</li> <li><code>transition.zip</code>: High-resolution simulations of dipolar spin ice near ordering transitions</li> <li><code>exchange.zip</code>: Loop-update simulations of near-neighbour spin ice</li> <li><code>otsuka.zip</code>: Loop-string simulation of idealised octahedral ice</li> <li><code>autocorr.zip</code>: Raw Monte Carlo samples for estimating autocorrelation times</li> <li><code>mcif.zip</code>: mcif files representing the four ordered phases</li> </ul> <p>Each zip archive contains a <code>README</code> file explaining its contents and the file formats used.</p>
Data underpinning "Localisation and Sub-Diffusive Transport in Quantum Spin Chains With Dilute Disorder"
<p>It is widely believed that many-body localisation in one dimension is fragile and can be easily destroyed by thermal inclusions, however there are still many open questions regarding the stability of the localised phase and under what conditions it breaks down. Here I construct models with dilute disorder, which interpolate between translationally invariant and fully random models, in order to study the breakdown of localisation. This opens up the possibility to controllably increase the density of thermal regions and examine the breakdown of localisation as this density is increased. At strong disorder, the numerical results are consistent with commonly-used diagnostics for localisation even when the concentration of thermalising regions is high. At moderate disorder, I present evidence for slow dynamics and sub-diffusive transport across a large region of the phase diagram, suggestive of a `bad metal' phase. This suggests that dilute disorder may be a useful effective model for studying Griffiths effects in many-body localisation, and perhaps also in a wider class of disordered systems.</p>
Matrix Approach to Accelerate Spin-Up of CLM5
<p>The spin-up problem hinders our ability to study some key issues in land carbon cycle modeling, such as sensitivity analysis. This work applies a new semi-analytical spin-up (SASU) framework to accelerate spin-up of Community Land Model matrix version 5. We evaluate the computational efficiency and steady-state consistency of ND, AD and SASU approaches using CLM5 at both one-site (Brazil) and the global scale. In addition, we test SASU in Parameter Perturbation Experiment (PPE) in CLM5.</p>
A tetrathiafulvalene salt of the nitrite (NO2−) anion: investigations of the spin-Peierls phase
<p>SQUID and EPR data of the publication</p> <p>Contain Data, metadata, source code and figures</p>
Griffiths Phase, Re-Entrant Spin-Glass Behaviour and Schottky Anomaly in Anti-Site Disordered Double Perovskite Pr2MnNiO6
<p>In the present study, the effect of anti-site disorder is explored on the magnetic properties of Pr2MnNiO6. Due to anti-site disorder, a reduced TC preceded by a Griffith phase has been observed. At low temperatures, we also report the development of the unconventional spin glass phase in co-existence with the cluster-like ferromagnetic order. The signature of the re-entrant spin glass phase is revealed by the frequency-dependent ac-susceptibility measurements. The spin glass behavior is also supported by the slow decay of thermo-remanent magnetization. A broad Schottky anomaly has been observed in the specific heat data near 10 K, along with a linear spin-glass term that was suppressed in the magnetic field of 5T. The analysis of the specific heat data indicates the presence of true singlet state of ground state of Pr3+ in Pr2MnNiO6</p>
Dataset for "Quantum spin models for numerosity perception"
<p>Data to recreate the figures 2-3, 6-9 of the manuscript "Quantum spin models for numerosity perception". For figure 5, we provide all of the numerically simulated data for the time evolution of our system whose average, spectrum and analysis is presented in the figure.</p> <p>The data is structured in individual folders for every figure and we provide a README file for each folder.</p>
Spin-wave spectra in antidot lattice with inhomogeneous perpendicular magnetic anisotropy
<p>Data for "Spin-wave spectra in antidot lattice with inhomogeneous perpendicular magnetic anisotropy"</p> <p>https://aip.scitation.org/doi/abs/10.1063/5.0128621</p>
Spin-polarizing electron beam splitter from crossed graphene nanoribbons
<p>OPEN DATA related to the research publication:</p> <p>S. Sanz, N. Papior, G. Giedke, D. Sánchez-Portal, M. Brandbyge, and T. Frederiksen, <br><em>Spin-polarizing electron beam splitter from crossed graphene nanoribbons</em>,<br><a href="https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.129.037701" target="_blank" rel="noopener">Phys. Rev. Lett. <strong>129</strong>, 037701 (2022)</a> [arXiv:2201.07147]</p> <p>Abstract: Junctions composed of two crossed graphene nanoribbons (GNRs) have been theoretically proposed as electron beam splitters where incoming electron waves in one GNR can be split coherently into propagating waves in <em>two</em> outgoing terminals with nearly equal amplitude and zero back-scattering. Here we scrutinize this effect for devices composed of narrow zigzag GNRs taking explicitly into account the role of Coulomb repulsion that leads to spin-polarized edge states within mean-field theory. We show that the beam-splitting effect survives the opening of the well-known correlation gap and, more strikingly, that a <em>spin-dependent</em> scattering potential emerges which spin polarizes the transmitted electrons in the two outputs. By studying different ribbons and intersection angles we provide evidence that this is a general feature with edge-polarized nanoribbons. A near-perfect polarization can be achieved by joining several junctions in series. Our findings suggest that GNRs are interesting building blocks in spintronics and quantum technologies with applications for interferometry and entanglement.</p>
Quantum critical dynamics in a 5000-qubit programmable spin glass: data repository
<p>Supporting data for "Quantum critical dynamics in a 5000-qubit programmable spin glass", Nature, 2023.</p>
Particle–hole symmetry protects spin-valley blockade in graphene quantum dots
<p> Experimental data and python scripts used to evaluate the data and to perform simulations for the publication</p> <p>" Particle-hole symmetry protects spin-valley blockade in graphene quantum dots " in Nature.</p> <p>https://doi.org/10.1038/s41586-023-05953-5</p> <p> </p>
Experimental data for "Magnetic field control of light-induced spin accumulation in monolayer MoSe2"
<p>This repository contains the experimental data related to the article "Magnetic field control of light-induced spin accumulation in monolayer MoSe<sub>2</sub>" and is provided to the reader under the “data availability” directive. The files have been organized following the figure notation of the main text.</p>
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These curated guides explain access requirements, typical timelines, costs, and reuse considerations for widely used research datasets.
Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
Annotated Behaviour and Observability Dataset (ABODe)
ABODe is a University of Edinburgh DataShare dataset for behavior classification in group-housed mice using home-cage video, identities, bounding boxes, ground-plate positions, and annotator labels.
DANDI Archive for NWB datasets
DANDI is a BRAIN Initiative archive for publishing and sharing neurophysiology data, including electrophysiology, optophysiology, and behavioral data packaged as NWB and related standards.
International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.