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Title: Strong lattice correlation of non-equilibrium quasiparticles in a pseudospin-1/2 Mott insulator Sr2IrO4

Journal Article · · Scientific Reports
DOI:https://doi.org/10.1038/srep19302· OSTI ID:1258620
 [1];  [2];  [3];  [1];  [1];  [3];  [4];  [4]
  1. Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
  2. Argonne National Lab. (ANL), Argonne, IL (United States). Center for Nanoscale Materials
  3. Michigan State Univ., East Lansing, MI (United States)
  4. Tulane Univ., New Orleans, LA (United States)

In correlated oxides the coupling of quasiparticles to other degrees of freedom such as spin and lattice plays critical roles in the emergence of symmetry-breaking quantum ordered states such as high temperature superconductivity. We report a strong lattice coupling of photon-induced quasiparticles in spin-orbital coupling Mott insulator Sr2IrO4 probed via optical excitation. Combining time-resolved x-ray diffraction and optical spectroscopy techniques, we reconstruct a spatiotemporal map of the diffusion of these quasiparticles. Due to the unique electronic configuration of the quasiparticles, the strong lattice correlation is unexpected but extends the similarity between Sr2IrO4 and cuprates to a new dimension of electron-phonon coupling which persists under highly non-equilibrium conditions.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC02-06CH11357; DMR-1205469; W911NF0910530
OSTI ID:
1258620
Alternate ID(s):
OSTI ID: 1392286
Journal Information:
Scientific Reports, Vol. 6; ISSN 2045-2322
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 10 works
Citation information provided by
Web of Science

References (51)

Interplay of electron–lattice interactions and superconductivity in Bi2Sr2CaCu2O8+δ journal August 2006
Bosonic Spectral Function and the Electron-Phonon Interaction in HTSC Cuprates journal January 2010
Diffusion of Nonequilibrium Quasi-Particles in a Cuprate Superconductor journal May 2003
Magnetic Couplings, Optical Spectra, and Spin-Orbit Exciton in 5 d Electron Mott Insulator Sr 2 IrO 4 journal October 2012
Epitaxial strain effect on the J eff = 1/2 moment orientation in Sr 2 IrO 4 thin films journal January 2014
Light-Induced Superconductivity in a Stripe-Ordered Cuprate journal January 2011
Phonon-assisted optical excitation in the narrow bandgap Mott insulator Sr 3 Ir 2 O 7 journal April 2014
Magnetic Excitation Spectra of Sr 2 IrO 4 Probed by Resonant Inelastic X-Ray Scattering: Establishing Links to Cuprate Superconductors journal April 2012
Confinement-Deconfinement Transition as an Indication of Spin-Liquid-Type Behavior in Na 2 IrO 3 journal January 2015
Continuous-time random-walk model of electron transport in nanocrystalline TiO 2 electrodes journal June 1999
Interplay between electron–phonon and Coulomb interactions in cuprates journal January 2008
Phase-Sensitive Observation of a Spin-Orbital Mott State in Sr2IrO4 journal March 2009
Charge transfer transitions in multiferroic BiFeO 3 and related ferrite insulators journal June 2009
Dimensionless solution of the equation describing the effect of surface recombination on carrier decay in semiconductors journal September 1994
Anomalous expansion of the copper-apical-oxygen distance in superconducting cuprate bilayers journal April 2010
Inelastic X-ray scattering in YBa2Cu3O6.6 reveals giant phonon anomalies and elastic central peak due to charge-density-wave formation journal November 2013
Fermi arcs in a doped pseudospin-1/2 Heisenberg antiferromagnet journal June 2014
Particle-hole bound states in Mott-Hubbard insulators journal September 1993
Electronic reconstruction at an interface between a Mott insulator and a band insulator journal April 2004
Polaronic-type excitons in ferroelectric oxides: Microscopic calculations and experimental manifestation journal March 2002
Observation of a metal-to-insulator transition with both Mott-Hubbard and Slater characteristics in Sr 2 IrO 4 from time-resolved photocarrier dynamics journal July 2012
Charge-transfer exciton in La 2 CuO 4 probed with resonant inelastic x-ray scattering journal February 2008
Anisotropic electronic properties of a -axis-oriented Sr 2 IrO 4 epitaxial thin-films journal September 2013
Carrier diffusion in amorphous semiconductors journal October 1983
Tuning electronic structure via epitaxial strain in Sr 2 IrO 4 thin films journal April 2013
Novel J eff = 1 / 2 Mott State Induced by Relativistic Spin-Orbit Coupling in Sr 2 IrO 4 journal August 2008
Time-Resolved Research at the Advanced Photon Source Beamline 7-ID
  • Dufresne, Eric M.; Adams, Bernhard; Arms, Dohn A.
  • SRI 2009, 10TH INTERNATIONAL CONFERENCE ON RADIATION INSTRUMENTATION, AIP Conference Proceedings https://doi.org/10.1063/1.3463168
conference January 2010
Doping a spin-orbit Mott insulator: Topological superconductivity from the Kitaev-Heisenberg model and possible application to (Na 2 /Li 2 )IrO 3 journal August 2012
Temperature dependence of the electronic structure of the J eff = 1 2 Mott insulator Sr 2 IrO 4 studied by optical spectroscopy journal November 2009
Orbital-dependent polaron formation in the relativistic Mott insulator Sr 2 IrO 4 journal July 2014
Temperature evolution of magnetic and transport behavior in 5 d Mott insulator Sr 2 IrO 4 : significance of magneto-structural coupling journal December 2014
Evidence for ubiquitous strong electron–phonon coupling in high-temperature superconductors journal August 2001
On the Williams--Watts function of dielectric relaxation journal February 1984
Disentangling the Electronic and Phononic Glue in a High-Tc Superconductor journal March 2012
Nonlinear lattice dynamics as a basis for enhanced superconductivity in YBa2Cu3O6.5 journal December 2014
Direct role of structural dynamics in electron-lattice coupling of superconducting cuprates journal December 2008
Giant magnetoelectric effect in the J eff = 1 2 Mott insulator Sr 2 IrO 4 journal October 2009
Twisted Hubbard Model for Sr 2 IrO 4 : Magnetism and Possible High Temperature Superconductivity journal March 2011
Mott-Hubbard exciton in the optical conductivity of YTiO 3 and SmTiO 3 journal August 2008
Persistent non-metallic behavior in Sr 2 IrO 4 and Sr 3 Ir 2 O 7 at high pressures journal June 2014
Nonequilibrium Phase Transitions in Cuprates Observed by Ultrafast Electron Crystallography journal April 2007
Excitonic quasiparticles in a spin–orbit Mott insulator journal July 2014
A step closer to visualizing the electron–phonon interplay in real time journal January 2009
Surface generation and detection of phonons by picosecond light pulses journal September 1986
True charge-transfer gap in parent insulating cuprates journal August 2011
Pressure Tuning of the Spin-Orbit Coupled Ground State in Sr 2 IrO 4 journal July 2012
Electronic Origin of Ultrafast Photoinduced Strain in BiFeO 3 journal January 2013
Phase Diagram of Cuprate High-Temperature Superconductors Described by a Field Theory Based on Anharmonic Oxygen Degrees of Freedom journal March 2015
Stretched-exponential relaxation arising from dispersive diffusion of hydrogen in amorphous silicon journal August 1987
Anisotropic Electron-Phonon Interaction in the Cuprates journal September 2004
Evidence for ubiquitous strong electron-phonon coupling in high-temperature superconductors text January 2001

Cited By (4)

Structure, magnetism, and transport properties for Ca doping in Sr 2 IrO 4 journal May 2017
Recovery of photoexcited magnetic ordering in Sr 2 IrO 4 journal April 2019
Giant photoinduced lattice distortion in oxygen vacancy ordered SrCoO 2.5 thin films journal October 2019
Infrared Spectroscopic Evidences of Strong Electronic Correlations in (Sr1−xLax)3Ir2O7 journal September 2016

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