3 research outputs found
Nematicity dynamics in the charge-density-wave phase of a cuprate superconductor
Understanding the interplay between charge, nematic, and structural ordering
tendencies in cuprate superconductors is critical to unraveling their complex
phase diagram. Using pump-probe time-resolved resonant x-ray scattering on the
(0 0 1) Bragg peak at the Cu L3 and oxygen K resonances, we investigate
non-equilibrium dynamics of Qa = Qb = 0 nematic order and its association with
both charge density wave (CDW) order and lattice dynamics in
La1.65Eu0.2Sr0.15CuO4. In contrast to the slow lattice dynamics probed at the
apical oxygen K resonance, fast nematicity dynamics are observed at the Cu L3
and planar oxygen K resonances. The temperature dependence of the nematicity
dynamics is correlated with the onset of CDW order. These findings
unambiguously indicate that the CDW phase, typically evidenced by translational
symmetry breaking, includes a significant electronic nematic component.Comment: 16 pages, 4 figure