Damped spin excitations in a doped cuprate superconductor with orbital hybridization
Damped spin excitations in a doped cuprate superconductor with orbital hybridization
A resonant inelastic x-ray scattering study of overdamped spin excitations in slightly underdoped ${\mathrm{La}}_{2\ensuremath{-}x}{\mathrm{Sr}}_{x}{\mathrm{CuO}}_{4}$ (LSCO) with $x=0.12$ and 0.145 is presented. Three high-symmetry directions have been investigated: (1) the antinodal $(0,0)\ensuremath{\rightarrow}(\frac{1}{2},0)$, (2) the nodal $(0,0)\ensuremath{\rightarrow}(\frac{1}{4},\frac{1}{4})$, and (3) the zone-boundary direction $(\frac{1}{2},0)\ensuremath{\rightarrow}(\frac{1}{4},\frac{1}{4})$ connecting these two. The overdamped excitations exhibit strong dispersions …