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

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

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3 Scopus citations

Abstract

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 Eu 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.

Original languageEnglish
Article number121105
JournalPhysical Review B
Volume95
Issue number12
DOIs
StatePublished - Mar 13 2017
Externally publishedYes

Funding

This research was supported by the Division of Materials Sciences and Engineering of the U.S. Department of Energy, Office of Basic Energy Sciences, under Contract No. DE-AC02-76SF00515 at SLAC National Accelerator Laboratory covering the experimental design, experiment execution, data analysis, and theoretical calculations (W.S.L., B.M., R.G.M., D.H.L., Z.X.S., and T.P.D.), under Contract No. DE-AC02-05CH11231 at Lawrence Berkeley National Laboratory (LBNL) covering RSXS endstation operation (Y.D.C. and Z.H., Advanced Light Source), and covering the joint development of mid-IR excitation at LCLS (G.C., J.R., and R.A.K., Ultrafast Materials Science program). The use of the Linac Coherent Light Source (LCLS), SLAC National Accelerator Laboratory, is supported by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences under Contract No. DE-AC02-76SF00515. Y.F.K. was supported by the Department of Defense (DOD) through the National Defense Science and Engineering Graduate Fellowship (NDSEG) Program and by the National Science Foundation (NSF) Graduate Research Fellowship under Grant No. 1147470. S.G. acknowledges partial support by the Swiss National Science Foundation under Fellowship No. P2EZP2-148737.

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