X-ray spectroscopy is an important tool for scientific analysis. While the earliest
demonstration experiments were realised in the laboratory, with the advent of synchrotron …

In the past decade, resonant inelastic x-ray scattering (RIXS) has made remarkable progress
as a spectroscopic technique. This is a direct result of the availability of high-brilliance …

Lifted Kramers spin degeneracy (LKSD) has been among the central topics of condensed-
matter physics since the dawn of the band theory of solids,. It underpins established practical …

Altermagnetism represents an emergent collinear magnetic phase with compensated order
and an unconventional alternating even-parity wave spin order in the non-relativistic band …

The search continues for nickel oxide-based materials with electronic properties similar to
cuprate high-temperature superconductors,,,,,,,,–. The recent discovery of superconductivity …

The search for improved energy-storage materials has revealed Li-and Na-rich intercalation
compounds as promising high-capacity cathodes. They exhibit capacities in excess of what …

Topological semimetals in crystals with a chiral structure (which possess a handedness due
to a lack of mirror and inversion symmetries) are expected to display numerous exotic …

The concept that superconductivity competes with other orders in cuprate superconductors
has become increasingly apparent, but obtaining direct evidence with bulk-sensitive probes …

The metal–insulator transition and the intriguing physical properties of rare-earth perovskite
nickelates have attracted considerable attention in recent years. Nonetheless, a complete …

The band theory of solids is arguably the most successful theory of condensed-matter
physics, providing a description of the electronic energy levels in various materials …