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19 results for “semimetal”
Magnetism and anomalous transport in the Weyl semimetal PrAlGe: Possible route to axial gauge fields
<p>The file ManuscriptDataFiles.7z contains the raw experimental data from which the figures are made in the manuscript entitled "Magnetism and anomalous transport in the Weyl semimetal PrAlGe: Possible route to axial gauge fields" that appeared in npj Quantum Materials <strong>5</strong>, 5 (2020).</p> <p>Paper Abstract: In magnetic Weyl semimetals, where magnetism breaks time-reversal symmetry, large magnetically sensitive anomalous transport responses are anticipated that could be useful for topological spintronics. The identification of new magnetic Weyl semimetals is therefore in high demand, particularly since in these systems Weyl node configurations may be easily modified using magnetic fields. Here we explore experimentally the magnetic semimetal PrAlGe, and unveil a direct correspondence between easy-axis Pr ferromagnetism and anomalous Hall and Nernst effects. With sizes of both the anomalous Hall conductivity and Nernst effect in good quantitative agreement with first principles calculations, we identify PrAlGe as a system where magnetic fields can connect directly to Weyl nodes via the Pr magnetization. Furthermore, we find the predominantly easy-axis ferromagnetic ground state co-exists with a low density of nanoscale textured magnetic domain walls. We describe how such nanoscale magnetic textures could serve as a local platform for tunable axial gauge fields of Weyl fermions.</p>
Type-III Dirac fermions in HfxZr1-xTe2 topological semimetal candidate (data)
<p>This dataset contains the raw data files connected to the figures included in the paper "<em>Type-III Dirac fermions in Hf<sub>x</sub>Zr<sub>1-x</sub>Te<sub>2</sub> topological semimetal candidate</em>" by S. Fragkos et al., Journal of Applied Physics <strong>129</strong>, 075104 (2021); <a href="https://doi.org/10.1063/5.0038799">https://doi.org/10.1063/5.0038799</a></p> <p>An Open Access version of the paper can be found here: <a href="https://zenodo.org/record/4562057#.YaDC4NBBxPY">https://zenodo.org/record/4562057#.YaDC4NBBxPY</a></p>
Epitaxial HfTe2 Dirac semimetal in the 2D limit (data)
<p>This dataset contains the raw data files connected to the figures included in the paper "<em>Epitaxial HfTe<sub>2</sub> Dirac semimetal in the 2D limit</em>" by P. Tsipas et al., APL Materials <strong>9</strong>, 101103 (2021); <a href="https://doi.org/10.1063/5.0065839">https://doi.org/10.1063/5.0065839</a></p> <p>An Open Access version of the paper can be found here: <a href="https://doi.org/10.1063/5.0065839">https://doi.org/10.1063/5.0065839</a></p>
Cu-doping effects on the ferromagnetic semimetal CeAuGe
<p>Dataset for the Journal article entitled "Cu-doping effects on the ferromagnetic semimetal CeAuGe"</p>
Spatiotemporal determination of photoinduced strain in a Weyl semimetal
<p>The raw data of project-Spatiotemporal determination of photoinduced strain in a Weyl semimetal, including UEM bright image sequence, time delay series and HRTEM of WTe2 sample.</p>
The optical absorption in semiconductor to semimetal PtSe2 arises from direct transitions - Supporting data
<p>Data supporting the findings of the work:</p> <p>M. Tharrault, S. Ayari, M. Arfaoui, E. Desgué, R. Le Goff, P. Morfin, J. Palomo, M. Rosticher, S. Jaziri, B. Plaçais, P. Legagneux, F. Carosella, C. Voisin, R. Ferreira and E. Baudin, <strong>The optical absorption in semiconductor to semimetal PtSe2 arises from direct transitions</strong><em>, <a href="https://doi.org/10.48550/arXiv.2311.01847">arXiv:2311.01847 [cond-mat.mtrl-sci]</a></em>.</p> <p> </p> <p>The sample names in this study match those used in the <strong>Raman spectroscopy focused study</strong> <a href="https://doi.org/10.1088/2053-1583/ad1e79">https://doi.org/10.1088/2053-1583/ad1e79</a>. Data from that study can be accessed at <a href="https://doi.org/10.5281/zenodo.8256907">https://doi.org/10.5281/zenodo.8256907</a>.</p> <p>See the Supplemental Material for extra details.</p> <p> </p> <p>Files available:</p> <p><strong>Optical absorption spectroscopy.zip:</strong> reflectance, transmittance, real and imaginary 2D optical conductivity for exfoliated and MBE samples.</p> <p><strong>Differential reflectance with temperature.zip:</strong> differential reflectance Delta R / R pour 4 exfoliated thin samples and temperatures from 290K to 440K.</p> <p><strong>Layers label attribution.txt:</strong> number of layers for each sample.</p> <p><strong>Selected samples fig1.txt: </strong>list of samples displayed in the figure 1 of the publication.</p> <p><strong>Band diagrams.zip:</strong> Band diagrams for GGA-computed 1-12L and AB stacked bilayers as well as GW and HSE06 computed 1L and the k-points path used for the diagrams.</p> <p><strong>Optical conductivity DFT.zip:</strong> real 2D optical conductivity and jDOS computed using GGA-IPA for 1-12L and AB stacked bilayers.</p> <p><strong>Optical absorption 1L different models.csv:</strong> GGA-IPA, GW-IPA, GW-BSE and HSE06-IPA real 2D optical conductivities for the monolayer.</p> <p><strong>1L optical absorption with temperature DFT.csv</strong>: 2D real optical conductivity of 1L PtSe2 computed with EPW/ZG Quantum Espresso package for T = 0 K to 450 K.</p> <p><strong>1L electronic spectral function with temperature.zip:</strong> electronic spectral function for 1L PtSe2 for T = 0, 300 and 450 K.</p> <p><strong>Atomic orbitals decomposition.zip:</strong> band diagrams and the corresponding orbital components, as displayed in Supplemental Material.</p> <p><strong>Electronic bandgap correction.txt:</strong> GGA computed bandgaps and corrected by the energy shift.</p>
Data set of "Large superconducting diode effect in ion-beam patterned Sn-based superconductor nanowire/topological Dirac semimetal planar heterostructures"
<p><span>Superconductor/topological material heterostructures are intensively studied as a platform for topological superconductivity and Majorana </span><span>physics</span><span>. However, the high cost of nanofabrication and the difficulty of preparing high-quality interfaces between the two dissimilar materials are common obstacles that hinder the observation of intrinsic physics and </span><span>the </span><span>realisation of scalable topological devices and circuits. </span><span>Here, we demonstrate an innovative method to directly draw nanoscale superconducting </span><span><span>beta-tin (</span></span><span><span>β-Sn</span></span><span><span>)</span></span><span><span> patterns of any shape in the plane of a topological Dirac </span></span><span><span>semimetal</span></span><span><span> (TDS) </span></span><span><span>alpha-tin (</span></span><span><span>α-Sn</span></span><span><span>)</span></span><span><span> thin </span></span><span><span>film</span></span><span><span> by irradiating a focused ion beam (FIB</span></span><span><span>). We utilise</span></span><span><span> the property that α-Sn undergoes a phase transition to superconducting β-Sn upon heating by FIB. </span></span><span><span>In β-Sn nanowires embedded in a TDS α-Sn thin film, we observe large </span></span><span><span>non-reciprocal</span></span><span><span> superconducting transport, where the critical current changes by 69% upon reversing the current direction. The superconducting diode rectification ratio <em>η</em> reaches a maximum of 35% when the magnetic field is applied parallel to the current, </span></span><span><span>distinguishing</span></span><span><span> itself from all the previous reports</span></span><span><span>. Moreover, it</span></span><span><span> oscillates between alternate signs with increasing magnetic field strength. </span></span><span><span>The angular</span></span><span><span> dependence of <em>η</em> on the magnetic field and current directions is similar to that of the chiral anomaly effect in TDS α-Sn, suggesting that the </span></span><span><span>SDE</span></span><span><span> may occur at the α-Sn/</span></span><span><span>β</span></span><span><span>-Sn interfaces where the TDS α-Sn becomes superconducting by a proximity effect.</span></span><span><span> As superconducting TDSs are expected candidates for topological superconductivity and harboring Majorana bound states,</span></span><span><span> t</span></span><span><span>he ion-beam patterned Sn-based superconductor/TDS planar structures thus </span></span><span><span>show promise</span></span><span><span> as a universal platform for investigating novel quantum physics and devices based on topological superconducting circuits of any shape.</span></span></p>
Datasets for Manuscript: Neural-Network-Assisted Detection of Superconducting Topological Semimetals
<p>This file contains datasets for an original machine-learning-approach that we developed for the identification of superconducting topological semimetals.</p>
Chiral surface superconductivity in half-Heusler semimetals
<p>Input and relevant output files for the VASP first-principles calculations on LuPtBi half-Heusler semimetal shown in the manuscript.</p>
Localized f-electron magnetism in the semimetal Ce3Bi4Au3
<p>Dataset for the simulation data included in the publication:<br> "Localized f-electron magnetism in the semimetal Ce3Bi4Au3"<br> M. O. Ajeesh, S. K. Kushwaha, S. M. Thomas, J. D. Thompson, M. K. Chan, N. Harrison, J. M. Tomczak, and P. F. S. Rosa<br> <br> This repository contains the in- and ouput data of the numerical simulations created by J. M. Tomczak.<br> When using the data included here, please cite the above paper and this zenodo archive.</p> <p><strong>FIGURES</strong></p> <p>The figures 7, 9, and 10 of the above manuscript were created with the following gnuplot scripts:</p> <p>./WIEN2k/plot_fig_9<br> ./DMFT/plot_fig_7a<br> ./DMFT/plot_fig_7b<br> ./DMFT/plot_fig_7c<br> ./DMFT/plot_fig_10a<br> ./DMFT/plot_fig_10b</p> <p>some gnuplot color palettes were taken from https://github.com/Gnuplotting/gnuplot-palettes<br> Beware, some of the data files and subdirectories might need to be un-zipped before plotting is possible.</p> <p><br> <strong>DATA</strong></p> <p><strong>Density functional theory</strong> (used code: [1])</p> <p> ./WIEN2k/Ce3Bi4Au3<br> ./WIEN2k/La3Bi4Au3</p> <p>The directories contain the internally relaxed structures material.struct, the converged potentials and a band-structure files materials.spaghetti_ene</p> <p><strong>Dynamical mean-field theory</strong> (used code: [2])</p> <p> ./DMFT/Ce3Bi4Au3/betaXXX</p> <p>where XXX=40,100,200 are the used inverse temperatures beta=1/(kBT)<br> Analytically continued self-energy (used code: [2])<br> ./DMFT/Ce3Bi4Au3/betaXXX/ancont</p> <p>momentum-resolved spectra<br> ./DMFT/Ce3Bi4Au3/beta200/akw</p> <p><strong>Linear response transport</strong> (used code: [3])</p> <p> ./DMFT/Ce3Bi4Au3/betaXXX/TRANSPORT/NkYxYxY/GimpZZmeV</p> <p>where Y=20,30,40,50 are the number of k-points in each direction and ZZ=10,20,30 is the "impurity" scattering rate Gamma_{imp} in meV. </p> <p>[1] Wien2k<br> @article{wien2k2020,<br> author = {Blaha,Peter and Schwarz,Karlheinz and Tran,Fabien and Laskowski,Robert and Madsen,Georg K. H. and Marks,Laurence D. },<br> title = {WIEN2k: An {APW}+lo program for calculating the properties of solids},<br> journal = {The Journal of Chemical Physics},<br> volume = {152},<br> number = {7},<br> pages = {074101},<br> year = {2020},<br> doi = {10.1063/1.5143061}<br> }</p> <p>[2] DFT+DMFT of Haule et al<br> @Article{PhysRevB.81.195107,<br> title = {Dynamical mean-field theory within the full-potential methods: Electronic structure of {CeIrIn$_5$}, {CeCoIn$_5$}, and {CeRhIn$_5$}},<br> author = {Haule, Kristjan and Yee, Chuck-Hou and Kim, Kyoo },<br> journal = {Phys. Rev. B},<br> volume = {81},<br> number = {19},<br> pages = {195107},<br> year = {2010},<br> month = {May},<br> doi = {10.1103/PhysRevB.81.195107},<br> publisher = {American Physical Society}<br> }</p> <p>[3] Linear Response Transport<br> @article{jmt_fesi,<br> author = {Tomczak, Jan M. and Haule, Kristjan and Kotliar, Gabriel}, <br> title = {Signatures of electronic correlations in iron silicide}, <br> volume = {109}, <br> number = {9}, <br> pages = {3243-3246}, <br> year = {2012}, <br> doi = {10.1073/pnas.1118371109}, <br> URL = {http://www.pnas.org/content/109/9/3243.abstract}, <br> journal = pnas,<br> note={preprint arXiv:1109.6561}<br> }</p>
Spin-voltage-driven efficient terahertz spin currents from the magnetic Weyl semimetals Co2MnGa and Co2MnAl
<p>We study ultrafast optically driven spin injection from thin films of the magnetic Weyl semimetals Co<sub>2</sub>MnGa and Co<sub>2</sub>MnAl into an adjacent Pt layer by means of terahertz emission spectroscopy. The following datasets are provided: THz waveforms, THz emission-signal amplitudes (rms) vs pump power, scaled THz signals as a figure of merit in terms of spin-injection efficiency, corresponding broadband spectra and extracted spin currents.</p>
Data from: Terahertz sensing based on the nonlinear electrodynamics of the two-dimensional correlated topological semimetal TaIrTe4
Open the record for dataset details and reuse information.
Source dataset of Figs.3 and S10 of "Higher-order topological semimetal in acoustic crystals"
<p><strong>Fig_3.xlsx</strong> is the source data from the third figure in the main text and <strong>Fig_S10.xlsx </strong>is the source data from the tenth figure in Supplementary Information of our submitted manuscript in Nature Materials (NM20062441C ) entitled <em>Higher-order topological semimetal in acoustic crystals. </em>by Qiang Wei<span>,</span> Xuewei Zhang, Weiyin Deng, Jiuyang Lu, Xueqin Huang, Mou Yan, Gang Chen, Zhengyou Liu, Suotang Jia<span>.</span></p> <p> </p> <p> </p>
Magnetoresistive-coupled transistor using the Weyl semimetal NbP
<p>On-chip magnetic field-induced modulation of the resistance of a Weyl semimetal.</p>
Supporting data for Kealhofer et al., "Controlling and visualizing Dirac physics in topological semimetal heterostructures" (2022)
<p>This repository contains data supporting Kealhofer et al., "Controlling and visualizing Dirac physics in topological semimetal heterostructures" (2022). Please see the corresponding publication for the corresponding author's contact information.</p>
Date of Square-root higher-order Weyl semimetals
<p>Date of Square-root higher-order Weyl semimetals</p>
Emergent flat band and topological Kondo semimetal driven by orbital-selective correlations
Open the record for dataset details and reuse information.
Data for "Quantum description of Fermi arcs in Weyl semimetals in a magnetic field"
<p>We provide the data used to produce Figures 3, 5, 6, 8, 9 and 10 in our publication "Quantum description of Fermi arcs in Weyl semimetals in a magnetic field". Note that the files for Figures 8 and 9 contain the logarithm of the raw data. More details are available in the first line of each respective CSV file.</p>
Anisotropic magnetoresistance in spin-orbit semimetal SrIrO3
<p>Datafiles for Figs. 1-4 of the article "Anisotropic magnetoresistance in spin–orbit semimetal SrIrO<sub>3</sub>", published in The European Physical Journal Plus.</p>
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