Nonequilibrium lattice-driven dynamics of stripes in nickelates using time-resolved x-ray scattering

作者：Lee W S^*; Kung Y F; Moritz B; Coslovich G; Kaindl R A; Chuang Y D; Moore R G; Lu D H; Kirchmann P S; Robinson J S; Minitti M P; Dakovski G; Schlotter W F; Turner J J; Gerber S; Sasagawa T; Hussain Z; Shen Z X; Devereaux T P

来源：PHYSICAL REVIEW B, 2017, 95(12): 121105.

DOI：10.1103/PhysRevB.95.121105

We investigate the lattice coupling to the spin and charge orders in the striped nickelate, La1.75Sr0.25NiO4, using time-resolved resonant x-ray scattering. Lattice-driven dynamics of both spin and charge orders are observed when the pump photon energy is tuned to that of an E-u bond-stretching phonon. We present a likely scenario for the behavior of the spin and charge order parameters and its implications using a Ginzburg-Landau theory.

• 出版日期2017-3-13