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

Abstract

We investigate the lattice coupling to the spin and charge orders in the striped nickelate, La 1.75 Sr 0.25 NiO 4 , 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.

Authors:
; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1348147
Report Number(s):
SLAC-PUB-16938
Journal ID: ISSN 2469-9950; PRBMDO
DOE Contract Number:
AC02-76SF00515
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review B; Journal Volume: 95; Journal Issue: 12
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; MATSCI, XFEL

Citation Formats

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., and Devereaux, T. P. Nonequilibrium lattice-driven dynamics of stripes in nickelates using time-resolved x-ray scattering. United States: N. p., 2017. Web. doi:10.1103/PhysRevB.95.121105.
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. Nonequilibrium lattice-driven dynamics of stripes in nickelates using time-resolved x-ray scattering. United States. doi:10.1103/PhysRevB.95.121105.
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., and Devereaux, T. P. Mon . "Nonequilibrium lattice-driven dynamics of stripes in nickelates using time-resolved x-ray scattering". United States. doi:10.1103/PhysRevB.95.121105. https://www.osti.gov/servlets/purl/1348147.
@article{osti_1348147,
title = {Nonequilibrium lattice-driven dynamics of stripes in nickelates using time-resolved x-ray scattering},
author = {Lee, W. S. and Kung, Y. F. and Moritz, B. and Coslovich, G. and Kaindl, R. A. and Chuang, Y. D. and Moore, R. G. and Lu, D. H. and Kirchmann, P. S. and Robinson, J. S. and Minitti, M. P. and Dakovski, G. and Schlotter, W. F. and Turner, J. J. and Gerber, S. and Sasagawa, T. and Hussain, Z. and Shen, Z. X. and Devereaux, T. P.},
abstractNote = {We investigate the lattice coupling to the spin and charge orders in the striped nickelate, La 1.75 Sr 0.25 NiO 4 , 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.},
doi = {10.1103/PhysRevB.95.121105},
journal = {Physical Review B},
number = 12,
volume = 95,
place = {United States},
year = {Mon Mar 13 00:00:00 EDT 2017},
month = {Mon Mar 13 00:00:00 EDT 2017}
}
  • Cited by 2
  • Here, we investigate the lattice coupling to the spin and charge orders in the striped nickelate, La 1.75 Sr 0.25 NiO 4, 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.
  • Here, we investigate the lattice coupling to the spin and charge orders in the striped nickelate, La 1.75Sr 0.25NiO 4, 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 also present a likely scenario for the behavior of the spin and charge order parameters and its implications using a Ginzburg-Landau theory.
  • Using synchrotron x-ray scattering on single crystals of Nd{sub 1/2}Sr{sub 1/2}MnO{sub 3} and La{sub 5/3}Sr{sub 1/3}NiO{sub 4}, we have demonstrated the existence of charge stripe structures in both compounds. In Nd{sub 1/2}Sr{sub 1/2}MnO{sub 3} charge ordered satellite reflections were located at positions (h/20l), h=odd and l=even. In addition we have also observed some weak reflections at other positions (h/2kl/2) and (h/20l/2), h and l=odd and k=1. The result is in accord with the CE-type antiferromagnetic structure as reported by neutron powder diffraction. The transition was observed to be at a transition temperature T{sub CO}{approx_equal}159 K and to be strongly firstmore » order in nature. By contrast, studies of La{sub 5/3}Sr{sub 1/3}NiO{sub 4} showed a second order transition at T{sub CO}{approx_equal}240 K. This produced charge stripe satellites with a wavevector q=(h{+-}2{epsilon}0l), h=even and l=odd. Critical exponents of the transition were obtained and show that the system is in the 2D universality class. The two dimensional nature of the charge stripes is clearly shown in their markedly different correlation lengths at low temperatures e.g., {xi}{sub a}{approx_equal}110 A, {xi}{sub b}{approx_equal}130 A, whist {xi}{sub c} is only about 17 A. These results demonstrate clearly that the charge stripes are themselves two dimensional in character.« less
  • Nonlinear optical phenomena in semiconductors present several fundamental problems in modern optics that are of great importance for the development of optoelectronic devices. In particular, the details of photo-induced lattice dynamics at early time-scales prior to carrier recombination remain poorly understood. We demonstrate the first integrated measurements of both optical and structural, material-dependent quantities while also inferring the bulk impulsive strain profile by using high spatial-resolution time-resolved x-ray scattering (TRXS) on bulk crystalline gallium arsenide. Our findings reveal distinctive laser-fluence dependent crystal lattice responses, which are not described by previous TRXS experiments or models. The initial linear expansion of themore » crystal upon laser excitation stagnates at a laser fluence corresponding to the saturation of the free carrier density before resuming expansion in a third regime at higher fluences where two-photon absorption becomes dominant. Our interpretations of the lattice dynamics as nonlinear optical effects are confirmed by numerical simulations and by additional measurements in an n-type semiconductor that allows higher-order nonlinear optical processes to be directly observed as modulations of x-ray diffraction lineshapes.« less