Anisotropic exchange and spin-wave damping in pure and electron-doped Sr2IrO4

@article{ ISI:000408703600001,
Author = {Pincini, D. and Vale, J. G. and Donnerer, C. and de la Torre, A. and
   Hunter, E. C. and Perry, R. and Sala, M. Moretti and Baumberger, F. and
   McMorrow, D. F.},
Title = {{Anisotropic exchange and spin-wave damping in pure and electron-doped
   Sr2IrO4}},
Journal = {{PHYSICAL REVIEW B}},
Year = {{2017}},
Volume = {{96}},
Number = {{7}},
Month = {{AUG 31}},
Abstract = {{The collective magnetic excitations in the spin-orbit Mott insulator
   (Sr1-x La-x)(2)IrO4 (x = 0, 0.01, 0.04, 0.1) were investigated by means
   of resonant inelastic x-ray scattering. We report significant magnon
   energy gaps at both the crystallographic and antiferromagnetic zone
   centers at all doping levels, along with a remarkably pronounced
   momentum-dependent lifetime broadening. The spin-wave gap is accounted
   for by a significant anisotropy in the interactions between J(eff) = 1/2
   isospins, thus marking the departure of Sr2IrO4 from the essentially
   isotropic Heisenberg model appropriate for the superconducting cuprates.}},
Publisher = {{AMER PHYSICAL SOC}},
Address = {{ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA}},
Type = {{Article}},
Language = {{English}},
Affiliation = {{Pincini, D (Corresponding Author), UCL, London Ctr Nanotechnol, Gower St, London WC1E6BT, England.
   Pincini, D (Corresponding Author), UCL, Dept Phys & Astron, Gower St, London WC1E6BT, England.
   Pincini, D (Corresponding Author), Diamond Light Source Ltd, Diamond House,Harwell Sci & Innovat Campus, Didcot OX11 0DE, Oxon, England.
   Pincini, D.; Vale, J. G.; Donnerer, C.; Perry, R.; McMorrow, D. F., UCL, London Ctr Nanotechnol, Gower St, London WC1E6BT, England.
   Pincini, D.; Vale, J. G.; Donnerer, C.; Perry, R.; McMorrow, D. F., UCL, Dept Phys & Astron, Gower St, London WC1E6BT, England.
   Pincini, D., Diamond Light Source Ltd, Diamond House,Harwell Sci & Innovat Campus, Didcot OX11 0DE, Oxon, England.
   Vale, J. G., Ecole Polytech Fed Lausanne, Lab Quantum Magnetism, CH-1015 Lausanne, Switzerland.
   de la Torre, A., CALTECH, 1200 East Calif Blvd, Pasadena, CA 91125 USA.
   de la Torre, A., CALTECH, Inst Quantum Informat & Matter, Pasadena, CA 91125 USA.
   Hunter, E. C., Univ Edinburgh, Sch Phys & Astron, SUPA, Mayfield Rd, Edinburgh EH9 3JZ, Midlothian, Scotland.
   Hunter, E. C., Univ Edinburgh, Ctr Sci Extreme Condit, Mayfield Rd, Edinburgh EH9 3JZ, Midlothian, Scotland.
   Sala, M. Moretti, European Synchrotron Radiat Facil, Boite Postale 220, F-38043 Grenoble, France.
   Baumberger, F., Univ Geneva, Dept Quantum Matter Phys, 24 Quai Ernest Ansermet, CH-1211 Geneva 4, Switzerland.
   Baumberger, F., Paul Scherrer Inst, Swiss Light Source, CH-5232 Villigen, Switzerland.
   Vale, J. G., Univ Oxford, Inorgan Chem, South Parks Rd, Oxford OX1 3QR, England.}},
DOI = {{10.1103/PhysRevB.96.075162}},
Article-Number = {{075162}},
ISSN = {{2469-9950}},
EISSN = {{2469-9969}},
Research-Areas = {{Materials Science; Physics}},
Web-of-Science-Categories  = {{Materials Science, Multidisciplinary; Physics, Applied; Physics,
   Condensed Matter}},
Author-Email = {{davide.pincini@diamond.ac.uk
   j.vale@ucl.ac.uk}},
ResearcherID-Numbers = {{Moretti, Marco/AAF-9255-2019
   Sala, Marco Moretti/H-1034-2014
   McMorrow, Desmond Francis/M-9036-2019
   McMorrow, Desmond/C-2655-2008
   Baumberger, Felix/A-5170-2008
   }},
ORCID-Numbers = {{Moretti, Marco/0000-0002-9744-9976
   Sala, Marco Moretti/0000-0002-9744-9976
   McMorrow, Desmond Francis/0000-0002-4947-7788
   McMorrow, Desmond/0000-0002-4947-7788
   Baumberger, Felix/0000-0001-7104-7541
   Pincini, Davide/0000-0002-0884-4748
   Giles, Emily/0000-0001-9880-1102}},
Funding-Acknowledgement = {{UK Engineering and Physical Sciences Research CouncilEngineering &
   Physical Sciences Research Council (EPSRC) {[}EP/N027671/1,
   EP/N034694/1]; Swiss National Science FoundationSwiss National Science
   Foundation (SNSF) {[}200021-146995]; Engineering and Physical Sciences
   Research CouncilEngineering & Physical Sciences Research Council
   (EPSRC) {[}EP/N034694/1, EP/N027671/1, EP/G007357/1] Funding Source:
   researchfish}},
Funding-Text = {{The authors would like to thank M. Rossi (ID20, ESRF) and S. Boseggia
   (UCL) for the helpful discussions and the support provided during the
   data analysis. This work is supported by the UK Engineering and Physical
   Sciences Research Council (Grants No. EP/N027671/1 and No. EP/N034694/1)
   and by the Swiss National Science Foundation (Grant No. 200021-146995).}},
Number-of-Cited-References = {{31}},
Times-Cited = {{17}},
Usage-Count-Last-180-days = {{2}},
Usage-Count-Since-2013 = {{37}},
Journal-ISO = {{Phys. Rev. B}},
Doc-Delivery-Number = {{FF2BT}},
Unique-ID = {{ISI:000408703600001}},
OA = {{Green Published, Green Accepted}},
DA = {{2020-12-22}},
}