TU Dresden Data Publications

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Data publications from research of Dresden University of Technology.

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Browsing TU Dresden Data Publications by Subject "3::32::307::307-01"

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    Open Access
    Data corresponding to the publication "Optical and acoustic plasmons in the layered material Sr2RuO4"
    (Technische Universität Dresden, 2025-03-21) Schultz, Johannes; Lubk, Axel; Jerzembeck, Fabian; Kikugawa, Naoki; Knupfer, Martin; Wolf, Daniel; Büchner, Bernd; Fink, Jörg
    We use momentum-dependent electron energy-loss spectroscopy in transmission to study collective charge excitations in the layer metal Sr2RuO4. This metal has a transition from a perfect Fermi liquid below T~30 K into a "strange" metal phase above T~800 K. We cover a complete range between in-phase and out-of-phase oscillations. Outside the classical range of electron-hole excitations, leading to a Landau damping, we observe well-defined plasmons. The optical (acoustic) plasmon due to an in-phase (out-of-phase) charge oscillation of neighbouring layers exhibits a quadratic (linear) positive dispersion. Using a model for the Coulomb interaction of the charges in a layered system, it is possible to describe the range of optical plasmon excitations at high energies in a mean-field random phase approximation without taking correlation effects into account. In contrast, resonant inelastic X-ray scattering data show at low energies an enhancement of the acoustic plasmon velocity due to correlation effects. This difference can be explained by an energy dependent effective mass which changes from ~ 3.5 at low energy to 1 at high energy near the optical plasmon energy. There are no signs of over-damped plasmons predicted by holographic theories.
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    Open Access
    Data for "Exposing the odd-parity superconductivity in CeRh2As2 with hydrostatic pressure"
    (Technische Universität Dresden, 2024-12-03) Semeniuk, Konstantin; Pfeiffer, Meike; Landaeta, Javier F.; Nicklas, Michael; Geibel, Christoph; Brando, Manuel; Khim, Seunghyun; Hassinger, Elena
    This archive contains the data of primarily experimental origin that are plotted in the main and supplementary figures of the article "Exposing the odd-parity superconductivity in CeRh2As2 with hydrostatic pressure" by M. Pfeiffer et al., published in Physical Review B 110, L100504 (2024). The data are provided it the form of text files, and the file names indicate where the data appear in the publication. These files contain tab-separated columns of numerical values. The first row of each file reads the column names. Rounding errors may give rise to some negligible inconsistencies between the data in this archive and the article. The figure data that come from other publications are not provided here. When more than one figure contain the same set of data, it is generally only provided once, in the folder corresponding to the first figure in which that set of data appears. Additional data and details related to the article can be obtained upon a reasonable request from the following authors: Konstantin Semeniuk (konstantin.semeniuk@cpfs.mpg.de), Elena Hassinger (elena.hassinger@tu-dresden.de).
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    Open Access
    Data for "Pressure-Tuned Quantum Criticality in the Locally Noncentrosymmetric Superconductor CeRh2As2"
    (Technische Universität Dresden, 2024-12-03) Pfeiffer, Meike; Semeniuk, Konstantin; Landaeta, Javier F.; Borth, Robert; Geibel, Christoph; Nicklas, Michael; Brando, Manuel; Khim, Seunghyun; Hassinger, Elena
    This archive contains the data of experimental origin plotted in the main and supplementary figures of the article "Pressure-Tuned Quantum Criticality in the Locally Noncentrosymmetric Superconductor CeRh2As2" by M. Pfeiffer et al., published in Physical Review Letters 133, 126506 (2024). The data are provided it the form of text files, and the file names indicate where the data appear in the publication. These files contain tab-separated columns of numerical values. The first row of each file reads the column names. Rounding errors may give rise to some negligible inconsistencies between the data in this archive and the article. Additional data and details related to the article can be obtained upon a reasonable request from the following authors: Konstantin Semeniuk (konstantin.semeniuk@cpfs.mpg.de), Elena Hassinger (elena.hassinger@tu-dresden.de).
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    Open Access
    Data Underpinning: Correlated proton disorder in the crystal structure of the double hydroxide perovskite CuSn(OH)₆
    (Technische Universität Dresden, 2025-01-16) Peets, Darren Campbell; Kulbakov, Anton A.; Häußler, Ellen; Parui, Kaushick K.; Mannathanath Chakkingal, Aswathi; Pavlovskii, Nikolai S.; Pomjakushin, Vladimir Yu.; Cañadillas-Delgado, Laura; Hansen, Thomas; Doert, Thomas; Inosov, Dmytro S.
    This contains the data underpinning our paper on CuSn(OH)₆. The abstract of the article is reproduced here: CuSn(OH)6 is a quantum spin system from the family of magnetic double perovskite hydroxides, having a frustrated magnetic sublattice. It is also known as the natural mineral mushistonite, whose crystal structure has remained elusive for decades. Here we employ x-ray and neutron powder diffraction to solve the crystal structure of CuSn(OH)6 and propose a structure model in the orthorhombic space group Pnnn with correlated proton disorder. The occupation of the hydrogen sites in the structure is constrained by “ice rules” similar to those known for water ice. The resulting frustration of the hydrogen bonding network is likely to have a complex and interesting interplay with the strong magnetic frustration expected in the face-centred magnetic sublattice. Structural distortions, which are quite pronounced in Cu2+ compounds due to the Jahn-Teller effect, partially alleviate both types of frustration. We also show that hydrostatic pressure tends to suppress proton disorder through a sequence of proton-ordering transitions, as some of the split hydrogen sites merge already at 1.75 GPa while others show a tendency toward possible merging at higher pressures.
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    Open Access
    Data Underpinning: Coupled frustrated ferromagnetic and antiferromagnetic quantum spin chains in the quasi-one-dimensional mineral antlerite Cu₃⁢SO₄(OH)₄
    (Technische Universität Dresden, 2024-11-06) Kulbakov, Anton A.; Kononenko, Denys Y.; Nishimoto, Satoshi; Stahl, Quirin; Mannathanath Chakkingal, Aswathi; Feig, Manuel; Gumeniuk, Roman; Skourski, Yurii; Bhaskaran, Lakshmi; Zvyagin, Sergei A.; Embs, Jan Peter; Puente-Orench, Inés; Wildes, Andrew; Geck, Jochen; Janson, Oleg; Inosov, Dmytro S.; Peets, Darren C.
    Abstract of the published article: Magnetic frustration, the competition among exchange interactions, often leads to novel magnetic ground states with unique physical properties which can hinge on details of interactions that are otherwise difficult to observe. Such states are particularly interesting when it is possible to tune the balance among the interactions to access multiple types of magnetic order. We present antlerite Cu₃⁢SO₄⁢(OH)₄ as a potential platform for tuning frustration. Contrary to previous reports, the low-temperature magnetic state of its three-leg zigzag ladders is a quasi-one-dimensional analog of the magnetic state recently proposed to exhibit spinon-magnon mixing in botallackite. Density functional theory calculations indicate that antlerite's magnetic ground state is exquisitely sensitive to fine details of the atomic positions, with each chain independently on the cusp of a phase transition, indicating an excellent potential for tunability.
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    Open Access
    Data Underpinning: Magnetic phase diagram of rouaite, Cu₂⁢(OH)₃⁢NO₃
    (Technische Universität Dresden, 2024-11-04) Peets, Darren Campbell; Mannathanath Chakkingal, Aswathi; Kulbakov, Anton A.; Grumbach, Justus; Pavlovskii, Nikolai S.; Stockert, Ulrike; Parui, Kaushick Krishnakanta; Avdeev, Maxim; Kumar, Ramender; Niwata, Issei; Häußler, Ellen; Gumeniuk, Roman; Stewart, J. Ross; Tellam, James P.; Pomjakushin, Vladimir; Granovsky, Sergey; Doerr, Mathias; Hassinger, Elena; Zherlitsyn, Sergei; Ihara, Yoshihiko; Inosov, Dmytro S.
    This contains the data underpinning our recent paper on rouaite, Cu₂⁢(OH)₃⁢NO₃, published in Phys. Rev. B 110, 054442 (2024). The abstract of the article is reproduced below: Spinon-magnon mixing was recently reported in botallackite Cu2⁢(OH)3⁢Br with a uniaxially compressed triangular lattice of Cu2+ quantum spins [H. Zhang et al., Phys. Rev. Lett. 125, 037204 (2020)]. Its nitrate counterpart rouaite, Cu2⁢(OH)3⁢NO3, has a highly analogous structure and might be expected to exhibit similar physics. To lay a foundation for research on this material, we clarify rouaite's magnetic phase diagram and identify both low-field phases. The low-temperature magnetic state consists of alternating ferromagnetic and antiferromagnetic chains, as in botallackite, but with additional canting, leading to net moments on all chains which rotate from one chain to another to form a 90∘ cycloidal pattern. The higher-temperature phase is a helical modulation of this order, wherein the spins rotate from one Cu plane to the next. This extends to zero temperature for fields perpendicular to the chains, leading to a set of low-temperature field-induced phase transitions. Rouaite may offer another platform for spinon-magnon mixing, while our results suggest a delicate balance of interactions and high tunability of the magnetism.
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    Open Access
    Data Underpinning: Stacking Disorder in Novel ABAC-Stacked Brochantite
    (Technische Universität Dresden, 2025-01-16) Mannathanath Chakkingal, Aswathi; Fuller, Chloe; Avdeev, Maxim; Gumeniuk, Roman; Rahn, Marein C.; Pabst, Falk; Wang, Yiran; Granovsky, Sergey; Chernyshov, Dmitry; Inosov, Dmytro S.; Peets, Darren C.
    Abstract of the accompanying article: In geometrically frustrated magnetic systems, weak interactions or slight changes to the structure can tip the delicate balance of exchange interactions, sending the system into a different ground state. Brochantite, Cu₄SO₄(OH)₆, has a copper sublattice composed of distorted triangles, making it a likely host for frustrated magnetism, but exhibits stacking disorder. The lack of synthetic single crystals has limited research on the magnetism in brochantite to powders and natural mineral crystals. We grew crystals which we find to be a new polytype with a tendency toward ABAC stacking and some anion disorder, alongside the expected stacking disorder. Comparison to previous results on natural mineral specimens suggests that cation disorder is more deleterious to the magnetism than anion and stacking disorder. Our specific heat data suggest a double transition on cooling into the magnetically ordered state.
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    Open Access
    Data Underpinning: Disordered ground state in the 3D face-centred frustrated spin-5/2 system MnSn(OH)₆
    (Technische Universität Dresden, 2025-03-04) Parui, Kaushick K.; Kulbakov, Anton A.; Häußler, Ellen; Pavlovskii, Nikolai S.; Mannathanath Chakkingal, Aswathi; Avdeev, Maxim; Gumeniuk, Roman; Granovsky, Sergey; Mistonov, Alexander; Zvyagin, Sergei; Doert, Thomas; Inosov, Dmytro S.; Peets, Darren C.
    This contains the data underpinning our paper on MnSn(OH)₆. The abstract of the article is reproduced below: Frustrated magnetism in face-centered cubic (fcc) magnetic sublattices remains underexplored but holds considerable potential for exotic magnetic behavior. Here, we report on the crystal structural, magnetic and thermodynamic properties of the A-site-vacant double hydroxide perovskite MnSn(OH)₆. Despite dominant antiferromagnetic interactions among Mn²⁺ moments, evidenced by a negative Curie-Weiss temperature, the lack of a sharp thermodynamic transition down to 350 mK implies the absence of long-range magnetic order. However, a broad hump at 1.6 K suggests short-range correlations and spin freezing, with power-law behavior consistent with a spin-glass state. Neutron diffraction at low temperatures confirms the presence of three-dimensional (3D) antiferromagnetic correlations, manifesting as diffuse magnetic scattering with a correlation length ξ = 24.66 Å and a magnetic propagation vector k = (0 0 ½) at 20 mK.
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    Open Access
    Data Underpinning: Incommensurate and multiple-q magnetic misfit order in the frustrated quantum spin ladder material antlerite
    (Technische Universität Dresden, 2024-11-28) Kulbakov, Anton A.; Sadrollahi, Elaheh; Rasch, Florian; Avdeev, Maxim; Gaß, Sebastian; Corredor Bohorquez, Laura Teresa; Wolter, Anja U. B.; Feig, Manuel; Gumeniuk, Roman; Poddig, Hagen; Stötzer, Markus; Litterst, F. Jochen; Puente-Orench, Inés; Wildes, Andrew; Weschke, Eugen; Geck, Jochen; Inosov, Dmytro S.; Peets, Darren Campbell
    This contains the data underpinning our recent paper on antlerite, Cu₃⁢SO₄(OH)₄, published in Phys. Rev. B 106, 174431 (2022). The abstract of the article is reproduced here: In frustrated magnetic systems, the competition amongst interactions can introduce extremely high degeneracy and prevent the system from readily selecting a unique ground state. In such cases, the magnetic order is often exquisitely sensitive to the balance among the interactions, allowing tuning among novel magnetically ordered phases. In antlerite, Cu3⁢SO4⁢(OH)4, Cu2+ (𝑆=1/2) quantum spins populate three-leg zigzag ladders in a highly frustrated quasi-one-dimensional structural motif. We demonstrate that at zero applied field, in addition to its recently reported low-temperature phase of coupled ferromagnetic and antiferromagnetic spin chains, this mineral hosts an incommensurate helical+cycloidal state, an idle-spin state, and a multiple-𝑞 phase which is the magnetic analog of misfit crystal structures. The antiferromagnetic order on the central leg is reentrant. The high tunability of the magnetism in antlerite makes it a particularly promising platform for pursuing exotic magnetic order.
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    Open Access
    Lorentz transmission electron microscopy and Hall effect data of Mn1.4PtSn
    (Technische Universität Dresden, 2024-09-21) Thomas, Andy; Pohl, Darius
    The extended dataset of our corresponding publications: 1) Images_Field_Sweep: Lorentz TEM images of the field sweep 2) Images_Sample_Tilt: Lorentz TEM images of the tilt series 3) MnPtSn_Pos7_Loop_0_500_-500_0mT_25uA_2sec.ma7: ASCII data magnetotransport of the field sweep in (1) 4) MnPtSn_Pos7_AS_Tilt_-7_Start_delta_50uA.ma7: ASCII data magnetotransport of the tilt series in (2) 5) Video_Field_Sweep.avi: Lower resolution video of all images in (1) 6) Video_Sample_Tilt.avi: Lower resolution video of all images in (2)