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Title: Ultrafast energy- and momentum-resolved dynamics of magnetic correlations in the photo-doped Mott insulator Sr2IrO4

Journal Article · · Nature Materials
DOI:https://doi.org/10.1038/NMAT4641· OSTI ID:1311357
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  1. Brookhaven National Lab. (BNL), Upton, NY (United States)
  2. Chinese Academy of Sciences (CAS), Beijing (China); Collaborative Innovation Center of Quantum Matter, Beijing (China)
  3. The Barcelona Institute of Science and Technology, Castelldefels (Barcelona) (Spain)
  4. SLAC National Accelerator Lab., Menlo Park, CA (United States)
  5. Max Planck Institute for the Structure and Dynamics of Matter, Hamburg (Germany)
  6. Univ. College London, London (United Kingdom)
  7. Argonne National Lab. (ANL), Argonne, IL (United States)
  8. Paul Scherrer Inst. (PSI), Villigen (Switzerland)
  9. RIKEN SPring-8 Center, Hyogo (Japan)
  10. Japan Synchrotron Radiation Institute, Hyogo (Japan)
  11. Univ. of Tennessee, Knoxville, TN (United States)
  12. Univ. of California, Berkeley, CA (United States)
  13. Max Planck Institute for Solid State Research, Stuttgart (Germany)
  14. ETH Zurich, Zurich (Switzerland)
  15. Univ. of Groningen, Groningen (The Netherlands)

Measuring how the magnetic correlations evolve in doped Mott insulators has greatly improved our understanding of the pseudogap, non-Fermi liquids and high-temperature superconductivity1, 2, 3, 4. Recently, photo-excitation has been used to induce similarly exotic states transiently5, 6, 7. However, the lack of available probes of magnetic correlations in the time domain hinders our understanding of these photo-induced states and how they could be controlled. Here, we implement magnetic resonant inelastic X-ray scattering at a free-electron laser to directly determine the magnetic dynamics after photo-doping the Mott insulator Sr2IrO4. We find that the non-equilibrium state, 2 ps after the excitation, exhibits strongly suppressed long-range magnetic order, but hosts photo-carriers that induce strong, non-thermal magnetic correlations. These two-dimensional (2D) in-plane Néel correlations recover within a few picoseconds, whereas the three-dimensional (3D) long-range magnetic order restores on a fluence-dependent timescale of a few hundred picoseconds. In conclusion, the marked difference in these two timescales implies that the dimensionality of magnetic correlations is vital for our understanding of ultrafast magnetic dynamics.

Research Organization:
Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC00112704
OSTI ID:
1311357
Report Number(s):
BNL-112461-2016-JA; R&D Project: PO011; KC0201060
Journal Information:
Nature Materials, Vol. 15, Issue 6; ISSN 1476-1122
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 93 works
Citation information provided by
Web of Science

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Cited By (30)

Picoscale materials engineering journal September 2017
Towards properties on demand in quantum materials journal October 2017
Unidirectional spin density wave state in metallic (Sr1−xLax)2IrO4 journal January 2018
Real-time observation of X-ray-induced intramolecular and interatomic electronic decay in CH2I2 journal May 2019
Probing dynamics in quantum materials with femtosecond X-rays journal June 2018
Watching ultrafast responses of structure and magnetism in condensed matter with momentum-resolved probes journal November 2017
Perspective: Opportunities for ultrafast science at SwissFEL journal November 2017
A tunable time-resolved spontaneous Raman spectroscopy setup for probing ultrafast collective excitation and quasiparticle dynamics in quantum materials journal July 2018
Epitaxial stabilization of Sr 3 Ir 2 O 7 thin films journal May 2019
Recent Developments in Ultrafast X-ray Techniques for Materials Science Applications journal September 2016
Using ultrashort terahertz pulses to directly probe spin dynamics in insulating antiferromagnets journal April 2018
Ultrafast magnetodynamics with free-electron lasers journal January 2018
Recovery of photoexcited magnetic ordering in Sr 2 IrO 4 journal April 2019
Emergent ultrafast phenomena in correlated oxides and heterostructures journal January 2017
Measuring non-equilibrium dynamics in complex solids with ultrashort X-ray pulses
  • Buzzi, Michele; Först, Michael; Cavalleri, Andrea
  • Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, Vol. 377, Issue 2145 https://doi.org/10.1098/rsta.2017.0478
journal April 2019
Ultrafast dynamics of spin and orbital correlations in quantum materials: an energy- and momentum-resolved perspective
  • Cao, Y.; Mazzone, D. G.; Meyers, D.
  • Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, Vol. 377, Issue 2145 https://doi.org/10.1098/rsta.2017.0480
journal April 2019
Epitaxial growth and antiferromagnetism of Sn-substituted perovskite iridate SrI r 0.8 S n 0.2 O 3 journal December 2019
Experimental station Bernina at SwissFEL: condensed matter physics on femtosecond time scales investigated by X-ray diffraction and spectroscopic methods journal April 2019
Anti-reflection coating design for metallic terahertz meta-materials journal January 2018
Short-wavelength free-electron laser sources and science: a review text January 2017
Measurement of the Resonant Magneto-Optical Kerr Effect Using a Free Electron Laser journal June 2017
SwissFEL: The Swiss X-ray Free Electron Laser journal July 2017
Perspective: Opportunities for ultrafast science at SwissFEL text January 2017
Anti-reflection coating design for metallic terahertz meta-materials conference January 2018
Watching ultrafast responses of structure and magnetism in condensed matter with momentum-resolved probes text January 2017
Watching ultrafast responses of structure and magnetism in condensed matter with momentum-resolved probes text January 2017
Perspective: Opportunities for ultrafast science at SwissFEL text January 2017
Short-wavelength free-electron laser sources and science: a review journal October 2017
Coupled charge and spin dynamics in a photo-excited Mott insulator text January 2018
Ultrafast dynamics of spin and orbital correlations in quantum materials: an energy- and momentum-resolved perspective text January 2018

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