Research Data Repository of Saxon Universities

OPARA is the Open Access Repository and Archive for Research Data of Saxon Universities.


Researchers of Saxon Universities can either publish their research data on OPARA, or archive it here to comply with requirements of funding acencies and good scientic practice, without public access.

You can find the documentation of this service at the ZIH Data Compendium websites. If you need suppourt using OPARA please contact the Servicedesk of TU Dresden.

Please note: The OPARA service was recently upgraded to a new technical platform (this site). Previously stored data will not be available here immediately. It can be found at the still active old version of OPARA. These stock data will be migrated in near future and then the old version of OPARA will finally be shut down. Existing DOIs for data publications remain valid.

Artwork based on 1, 2, 3, 4  @pixabay
 

Communities in OPARA

Select a community to browse its collections.

Recent Submissions

Item
Open Access
Research data for journal article: On the correlatability of thermodynamic and spectroscopic ideal and real behaviour: Excess Gibbs energy vs Raman spectra
(Technische Universität Bergakademie Freiberg, 2025-09-12) Willger, Miriam
With this data it was investigated whether Raman spectra of binary mixtures can be linked to thermodynamic properties such as the molar excess Gibbs energy and activity coefficients. No correlation between excess molar or partial molar Raman intensities and these thermodynamic parameters was found, and it was shown that peak shifts do not necessarily indicate deviations from ideal mixture behaviour. Details on the Voigt modelling procedure can be found in the Supporting Information of the related journal article.
Item
Open Access
Data corresponding to paper: "Incorporation of a Viscoelastic-Elastoplastic Material Model for Asphalt based on the Multiscale Microlayer Model into an ALE Formulation for Pavement Structures Considering Dynamic Tire Loadings" by May et al. (submitted 2025)
(Technische Universität Dresden, 2025-09-12) May, Marcel; Anantheswar, Atul; Yordanov, Ventseslav; Derakhi, Elaheh; Hartung, Felix; Wollny, Ines; Eckstein, Lutz; Kaliske, Michael
This data publication contains the data related to the scientific contribution "Incorporation of a Viscoelastic-Elastoplastic Material Model for Asphalt based on the Multiscale Microlayer Model into an ALE Formulation for Pavement Structures Considering Dynamic Tire Loadings" by May et al. (submitted 2025). Abstract of the corresponding paper: During braking, acceleration, and steering maneuvers in road traffic, dynamic vertical loads are introduced into the pavement structure. These loads give rise to complex multiaxial stress states within the layered pavement structure, which consists of materials with differing mechanical behavior. The dynamic nature of these maneuvers requires that the resulting stress states have to be considered over large spatial and temporal intervals. In this work, a novel multiscale ALE-FEM approach is introduced for the first time, capable of capturing the complex, multiaxial stress states within the asphalt pavement during steering and acceleration maneuvers. Numerical efficiency and physical representativeness are achieved through the use of a finite viscoelastic–elastoplastic material model embedded in the microlayer framework, a thermodynamically derived multiscale approach that avoids the computational cost of a conventional FE² scheme. Additionally, the application of a dynamic Arbitrary Lagrangian-Eulerian (ALE) formulation ensures that the meshed geometry remains small in comparison to the extensive length of the actually traversed road section. To experimentally determine the loads generated by a tire during a steering maneuver, a single-wheel test rig is used, in which, the side slip angle is systematically varied. The measured data is then used to generate time- and space-resolved footprints, which serve as realistic boundary conditions for simulating tire pavement interaction.
Item
Open Access
Research data for: "Guest Particle Deformation and Powder Flow Behavior in Mechano-Fusion: Linking Microscopic Structure to Macroscopic Performance"
(Technische Universität Bergakademie Freiberg, 2025-09-09) Seyffer, Judith Miriam
The research data set comprises the process data of mechano-fusion experiments (machine raw data and experiment meta data) and measurement data of different characterization methods (laser diffraction, BET specific surface area, powder flowability) for the investigated particle samples after mechano-fusion. The data corresponds to the publication "Guest Particle Deformation and Powder Flow Behavior in Mechano-Fusion: Linking Microscopic Structure to Macroscopic Performance" by Seyffer et al. (2025). Further information can be found in the provided Readme file and in the corresponding publication.
Item
Open Access
Data for "Dirac quantum criticality in twisted double bilayer transition metal dichalcogenides"
(Technische Universität Dresden, 2025-09-09) Biedermann, Jan; Janssen, Lukas
The archive contains the data used to construct Figs. 2-6 and 8 of the paper "Dirac quantum criticality in twisted double bilayer transition metal dichalcogenides" by Jan Biedermann and Lukas Janssen [arXiv:2509.04561]. The work uses self-consistent Hartree-Fock calculations to compute the phase diagram of twisted double bilayer transition metal dichalcogenides as a function of the twist angle and applied pressure.
Item
Open Access
Data for the paper "Magnetic order and Li-diffusion in the 1/3-filled Kagome layers of antiperovskite Lithium-ion battery materials (Li2Fe)SO and (Li2Fe)SeO"
(Technische Universität Dresden, 2025-08-29) Seewald, F.; Schulze, T.; Gräßler, N.; Carstens, F. L.; Singer, L.; Mohamed, M. A. A.; Hampel, S.; Büchner, B.; Klingeler, R.; Klauss, H.-H.; Grafe, H.-J.
The recently discovered lithium-rich antiperovskites (Li2Fe)SeO and (Li2Fe)SO host lithium and iron ions on the same atomic position which octahedrally coordinates to central oxygens. In a cubic antiperovskite these sites form Kagome planes stacked along the < 111 > directions which triangular motifs induce high geometric frustration in the diluted magnetic sublattice for antiferromagnetic interactions. Despite their compelling properties as high-capacity Li-ion battery cathode materials, very little is known about the electronic and magnetic properties of lithium-rich antiperovskites. We report static magnetization, M¨ossbauer, and NMR studies on both compounds. Our data reveal a Pauli paramagnetic-like behaviour, a long-range antiferromagnetically ordered ground state below ≈ 50 K and a regime of short-range magnetic correlations up to 100 K. Our results are consistent with a random Li-Fe distribution on the shared lattice position. In addition, Li-hopping is observed above 200 K with an activation energy of Ea = 0.47 eV. Overall, our data elucidate static magnetism in a disordered magnetically frustrated and presumably semimetallic system with thermally induced ion diffusion dynamics.