High-temperature copper oxide superconductors consist of stacked CuO2 planes, with
electronic band structures and magnetic excitations that are primarily two-dimensional,, but …

High T c superconductors show a rich variety of phases associated with their charge
degrees of freedom. Valence charges can give rise to charge ordering or acoustic plasmons …

We use resonant inelastic x-ray scattering to probe the propagation of plasmons in the
electron-doped cuprate superconductor Sr 0.9 La 0.1 CuO 2. We detect a plasmon gap of∼ …

Electron correlations play a dominant role in the charge dynamics of the cuprates. We use
resonant inelastic X-ray scattering (RIXS) to track the do** dependence of the collective …

Estimating many-body effects that deviate from an independent particle approach has long
been a key research interest in condensed matter physics. Layered cuprates are prototypical …

Despite decades of intensive experimental and theoretical efforts, the physics of cuprate
high-temperature superconductors in general, and, in particular, their normal state, is still …

The parent compound of high-T c cuprate superconductors is a Mott insulator described by
the Heisenberg spin–spin interaction on a square lattice. With carrier do**, the charge …

The recent development of x-ray scattering techniques revealed the charge-excitation
spectrum in high-T c cuprate superconductors. While the presence of a dispersive signal in …

We perform a comprehensive study of charge excitations in a bilayer electron system in the
presence of the long-range Coulomb interaction (LRC). Our major point is to derive formulae …

We investigated the high energy spin excitations in electron-doped La 2-x Ce x CuO 4, a
cuprate superconductor, by resonant inelastic x-ray scattering (RIXS) measurements. Efforts …