T. Schmitt

TL;DR: In this article, the case for magnetically mediated superconductivity was strengthened by the discovery of high-energy magnetic excitations that are not affected by chemical doping levels within several cuprates.

TL;DR: The separation of the orbital degree of freedom (orbiton) is observed using resonant inelastic X-ray scattering on the one-dimensional Mott insulator Sr2CuO3 to resolve an orbiton separating itself from spinons and propagating through the lattice as a distinct quasi-particle with a substantial dispersion in energy over momentum.

TL;DR: It is shown that coherent magnetic excitations, magnons, known from the bulk order, persist even in a single layer of La(2)CuO(4), with no evidence for more complex correlations such as resonating valence bond correlations.

TL;DR: The persistence of spin excitations well into the superconducting phase suggests that the spin fluctuations in Fe-pnictide superconductors originate from a distinctly correlated spin state, and connects Fe pnictides to cuprates, for which, in spite of fundamental electronic structure differences, similar paramagnons are present.

TL;DR: In this paper, the collective modes of superconductors are measured using resonant inelastic X-ray scattering, and the asymmetry is further highlighted by unexpected collective modes measured using resonance.