Publications by authors named "D Fobes"
Article Synopsis
- Electrons at the borders of localization lead to unique states of matter in strongly correlated electron materials, like heavy electron metals, which showcase interesting magnetic behaviors.
- These phenomena arise from the interplay between localized and itinerant electrons, giving rise to novel states such as unconventional superconductivity and topological states of matter.
- The researchers simplified the complex Kondo lattice model for the antiferromagnet CeIn by integrating bandstructure calculations with a multi-orbital model, successfully validating their findings through neutron spectroscopy, thus enhancing our understanding of metallic quantum states.
Article Synopsis
- - The study explores how spin excitations, or magnons, behave in a unique magnetic structure called skyrmion tubes, which shows a parallel to the Lorentz force acting on charged particles in magnetic fields.
- - By using polarized inelastic neutron scattering, researchers examined how these magnons propagate in manganese silicide and found patterns resembling emergent Landau levels due to the skyrmion’s nontrivial topology.
- - The findings indicate a distinct topological magnon band structure in reciprocal space, linking the complex arrangement of the skyrmion lattice to the observed behavior of these spin excitations.
The idea of employing non-Abelian statistics for error-free quantum computing ignited interest in reports of topological surface superconductivity and Majorana zero modes (MZMs) in FeTeSe. However, the topological features and superconducting properties are not observed uniformly across the sample surface. The understanding and practical control of these electronic inhomogeneities present a prominent challenge for potential applications.
View Article and Find Full Text PDFActivating the O molecule is at the heart of a variety of technological applications, most prominently in energy conversion schemes including solid oxide fuel cells, electrolysis, and catalysis. Perovskite oxides, both traditionally-used and novel formulations, are the prime candidates in established and emerging energy devices. This work shows that the as-cleaved and unmodified CaO-terminated (001) surface of CaRuO, a Ruddlesden-Popper perovskite, supports a full monolayer of superoxide ions, O, when exposed to molecular O.
View Article and Find Full Text PDFAs complex ternary perovskite-type oxides are increasingly used in solid oxide fuel cells, electrolysis and catalysis, it is desirable to obtain a better understanding of their surface chemical properties. Here we report a pronounced ordering of hydroxyls on the cleaved (001) surface of the Ruddlesden-Popper perovskite CaRuO upon water adsorption at 105 K and subsequent annealing to room temperature. Density functional theory calculations predict the dissociative adsorption of a single water molecule (E = 1.
View Article and Find Full Text PDF