Doping Evolution of Magnetic Order and Magnetic Excitations in (Sr1-xLax)(3)Ir2O7

@article{ ISI:000391927700009,
Author = {Lu, Xingye and McNally, D. E. and Sala, M. Moretti and Terzic, J. and
   Upton, M. H. and Casa, D. and Ingold, G. and Cao, G. and Schmitt, T.},
Title = {{Doping Evolution of Magnetic Order and Magnetic Excitations in
   (Sr1-xLax)(3)Ir2O7}},
Journal = {{PHYSICAL REVIEW LETTERS}},
Year = {{2017}},
Volume = {{118}},
Number = {{2}},
Month = {{JAN 12}},
Abstract = {{We use resonant elastic and inelastic x-ray scattering at the Ir-L-3
   edge to study the doping-dependent magnetic order, magnetic excitations,
   and spin-orbit excitons in the electron-doped bilayer iridate
   (Sr1-xLax)(3)Ir2O7 (0 <= x <= 0.065). With increasing doping x, the
   three-dimensional long range anti-ferromagnetic order is gradually
   suppressed and evolves into a three-dimensional short range order across
   the insulator-to-metal transition from x = 0 to 0.05, followed by a
   transition to two-dimensional short range order between x = 0.05 and
   0.065. Because of the interactions between the J(eff) = 1/2 pseudospins
   and the emergent itinerant electrons, magnetic excitations undergo
   damping, anisotropic softening, and gap collapse, accompanied by weakly
   doping-dependent spin-orbit excitons. Therefore, we conclude that
   electron doping suppresses the magnetic anisotropy and interlayer
   couplings and drives (Sr1-xLax)(3)Ir2O7 into a correlated metallic state
   with two-dimensional short range antiferromagnetic order. Strong
   antiferromagnetic fluctuations of the J(eff) = 1/2 moments persist deep
   in this correlated metallic state, with the magnon gap strongly
   suppressed.}},
Publisher = {{AMER PHYSICAL SOC}},
Address = {{ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA}},
Type = {{Article}},
Language = {{English}},
Affiliation = {{Lu, XY (Corresponding Author), Paul Scherrer Inst, Res Dept Synchrotron Radiat & Nanotechnol, CH-5232 Villigen, Switzerland.
   Lu, Xingye; McNally, D. E.; Ingold, G.; Schmitt, T., Paul Scherrer Inst, Res Dept Synchrotron Radiat & Nanotechnol, CH-5232 Villigen, Switzerland.
   Sala, M. Moretti, European Synchrotron Radiat Facil, BP 220, F-38043 Grenoble, France.
   Terzic, J.; Cao, G., Univ Kentucky, Dept Phys & Astron, Lexington, KY 40506 USA.
   Terzic, J.; Cao, G., Univ Colorado Boulder, Dept Phys, Boulder, CO 80309 USA.
   Upton, M. H.; Casa, D., Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA.
   Ingold, G., Paul Scherrer Inst, SwissFEL, CH-5232 Villigen, Switzerland.}},
DOI = {{10.1103/PhysRevLett.118.027202}},
Article-Number = {{027202}},
ISSN = {{0031-9007}},
EISSN = {{1079-7114}},
Keywords-Plus = {{FERMI ARCS; SPIN; PHYSICS}},
Research-Areas = {{Physics}},
Web-of-Science-Categories  = {{Physics, Multidisciplinary}},
Author-Email = {{xingye.lu@psi.ch
   thorsten.schmitt@psi.ch}},
ResearcherID-Numbers = {{Lu, Xingye/Q-4184-2019
   Moretti, Marco/AAF-9255-2019
   Schmitt, Thorsten/A-7025-2010
   Sala, Marco Moretti/H-1034-2014
   }},
ORCID-Numbers = {{Lu, Xingye/0000-0002-0409-1240
   Moretti, Marco/0000-0002-9744-9976
   Sala, Marco Moretti/0000-0002-9744-9976
   Lu, Xingye/0000-0001-7526-3145
   McNally, Daniel/0000-0003-3872-4306}},
Funding-Acknowledgement = {{Swiss National Science FoundationSwiss National Science Foundation
   (SNSF); NCCR-MARVEL; European CommunityEuropean Community (EC)
   {[}290605]; US National Science FoundationNational Science Foundation
   (NSF) {[}DMR-1265162, DMR-1712101]; DOE Office of Science by Argonne
   National LaboratoryUnited States Department of Energy (DOE)
   {[}DE-AC02-06CH11357]}},
Funding-Text = {{We thank Matteo Rossi (ESRF) for helpful discussions. The work at PSI is
   supported by the Swiss National Science Foundation through its Sinergia
   network Mott Physics Beyond the Heisenberg Model (MPBH) and the
   NCCR-MARVEL. Xingye Lu acknowledges financial support from the European
   Community's Seventh Framework Programme (FP7/2007-2013) under Grant
   agreement No. 290605 (COFUND: PSI-FELLOW). G. Cao acknowledges support
   by the US National Science Foundation via Grants No. DMR-1265162 and No.
   DMR-1712101. The work used Sector 27 of the Advanced Photon Source, a
   U.S. Department of Energy (DOE) Office of Science User Facility operated
   for the DOE Office of Science by Argonne National Laboratory under
   Contract No. DE-AC02-06CH11357.}},
Number-of-Cited-References = {{56}},
Times-Cited = {{17}},
Usage-Count-Last-180-days = {{1}},
Usage-Count-Since-2013 = {{47}},
Journal-ISO = {{Phys. Rev. Lett.}},
Doc-Delivery-Number = {{EH7BL}},
Unique-ID = {{ISI:000391927700009}},
OA = {{Green Published, Bronze}},
DA = {{2020-12-22}},
}