A5053964929- Advanced Condensed Matter Physics
- Magnetic and transport properties of perovskites and related materials
- Physics of Superconductivity and Magnetism
- Theoretical and Computational Physics
- Multiferroics and related materials
- Magnetic properties of thin films
Max Planck Institute for Solid State Research
2021-2022
Heinz Maier-Leibnitz Zentrum
2022
Max Planck Society
2022
Max Planck Computing and Data Facility
2021
We report a comprehensive study of magnetic correlations in ${\mathrm{LaNiO}}_{2}$, parent compound the recently discovered family infinite-layer (IL) nickelate superconductors, using multiple experimental and theoretical methods. Our specific heat, muon-spin rotation ($\ensuremath{\mu}\mathrm{SR}$), susceptibility measurements on polycrystalline ${\mathrm{LaNiO}}_{2}$ show that long-range order remains absent down to 2 K. Nevertheless, we detect residual entropy low-temperature which is...
Neutron spin‐echo (NSE) spectroscopy is a powerful tool for the study of magnon lifetimes and magnetic critical dynamics. The unique property NSE energy resolution in range. first spectrometers were optimized quasielastic scattering at small momentum transfers delivered substantial contributions to understanding dynamics ferromagnets dynamic correlations spin glasses. subsequent resonant (NRSE) technique extends parameter range toward large permits measure across Brillouin zone. NRSE also...
Materials realizing the XY model in two dimensions (2D) are sparse. Here we use neutron triple-axis spectroscopy to investigate critical static and dynamical magnetic fluctuations square-lattice antiferromagnets Ca$_{2}$RuO$_{4}$ Ca$_{3}$Ru$_2$O$_{7}$. We probe temperature-dependence of antiferromagnetic (AFM) Bragg-intensity, $Q$-width, amplitude, energy-width diffuse scattering vicinity Néel temperature $T_N$ determine behavior order parameter $M$, correlation length $ξ$, susceptibility...