Locking of iridium magnetic moments to the correlated rotation of oxygen octahedra in Sr2IrO4 revealed by x-ray resonant scattering

@article{ ISI:000325337700002,
Author = {Boseggia, S. and Walker, H. C. and Vale, J. and Springell, R. and Feng,
   Z. and Perry, R. S. and Sala, M. Moretti and Ronnow, H. M. and Collins,
   S. P. and McMorrow, D. F.},
Title = {{Locking of iridium magnetic moments to the correlated rotation of oxygen
   octahedra in Sr2IrO4 revealed by x-ray resonant scattering}},
Journal = {{JOURNAL OF PHYSICS-CONDENSED MATTER}},
Year = {{2013}},
Volume = {{25}},
Number = {{42}},
Month = {{OCT 23}},
Abstract = {{Sr2IrO4 is a prototype of the class of Mott insulators in the strong
   spin-orbit interaction (SOI) limit described by a J(eff) = 1/2 ground
   state. In Sr2IrO4, the strong SOI is predicted to manifest itself in the
   locking of the canting of the magnetic moments to the correlated
   rotation by 11.8(1)degrees of the oxygen octahedra that characterizes
   its distorted layered perovskite structure. Using x-ray resonant
   scattering at the Ir L-3 edge we have measured accurately the
   intensities of Bragg peaks arising from different components of the
   magnetic structure. From a careful comparison of integrated intensities
   of peaks due to basal-plane antiferromagnetism, with those due to b-axis
   ferromagnetism, we deduce a canting of the magnetic moments of
   12.2(8)degrees. We thus confirm that in Sr2IrO4 the magnetic moments
   rigidly follow the rotation of the oxygen octahedra, indicating that,
   even in the presence of significant non-cubic structural distortions, it
   is a close realization of the J(eff) = 1/2 state.}},
Publisher = {{IOP PUBLISHING LTD}},
Address = {{TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND}},
Type = {{Article}},
Language = {{English}},
Affiliation = {{Boseggia, S (Corresponding Author), UCL, London Ctr Nanotechnol, Mortimer St, London WC1E 6BT, England.
   Boseggia, S.; Vale, J.; Feng, Z.; McMorrow, D. F., UCL, London Ctr Nanotechnol, London WC1E 6BT, England.
   Boseggia, S.; Vale, J.; Feng, Z.; McMorrow, D. F., UCL, Dept Phys & Astron, London WC1E 6BT, England.
   Boseggia, S.; Collins, S. P., Diamond Light Source Ltd, Didcot OX11 0DE, Oxon, England.
   Walker, H. C., Deutsch Elektronen Synchrotron DESY, D-22607 Hamburg, Germany.
   Ronnow, H. M., Ecole Polytech Fed Lausanne, ICMP, Lab Quantum Magnetism, CH-1015 Lausanne, Switzerland.
   Springell, R., Univ Bristol, Interface Anal Ctr, Royal Commiss Exhibit 1851, Bristol BS2 8BS, Avon, England.
   Perry, R. S., Univ Edinburgh, Scottish Univ Phys Alliance, Sch Phys, Edinburgh EH9 3JZ, Midlothian, Scotland.
   Sala, M. Moretti, European Synchrotron Radiat Facil, F-38043 Grenoble, France.
   McMorrow, D. F., Tech Univ Denmark, Dept Phys, DK-2800 Lyngby, Denmark.}},
DOI = {{10.1088/0953-8984/25/42/422202}},
Article-Number = {{422202}},
ISSN = {{0953-8984}},
EISSN = {{1361-648X}},
Keywords-Plus = {{POLARIZATION DEPENDENCE}},
Research-Areas = {{Physics}},
Web-of-Science-Categories  = {{Physics, Condensed Matter}},
Author-Email = {{stefano.boseggia@diamond.ac.uk}},
ResearcherID-Numbers = {{Vale, James/A-1475-2016
   Collins, Stephen/AAG-7910-2020
   Feng, Zhenxing/J-7457-2013
   Ronnow, Henrik M/A-4953-2009
   Moretti, Marco/AAF-9255-2019
   Walker, Helen C/C-4201-2011
   McMorrow, Desmond/C-2655-2008
   McMorrow, Desmond Francis/M-9036-2019
   Sala, Marco Moretti/H-1034-2014}},
ORCID-Numbers = {{Vale, James/0000-0002-9148-3575
   Feng, Zhenxing/0000-0001-7598-5076
   Ronnow, Henrik M/0000-0002-8832-8865
   Moretti, Marco/0000-0002-9744-9976
   Walker, Helen C/0000-0002-7859-5388
   McMorrow, Desmond/0000-0002-4947-7788
   McMorrow, Desmond Francis/0000-0002-4947-7788
   Sala, Marco Moretti/0000-0002-9744-9976}},
Funding-Acknowledgement = {{EPSRC in the UKEngineering & Physical Sciences Research Council (EPSRC)
   {[}EP/J016713/1]; Nordea Fonden in Denmark; Otto Mosteds Fond;
   Engineering and Physical Sciences Research CouncilEngineering &
   Physical Sciences Research Council (EPSRC) {[}EP/J016713/1, 1745233,
   EP/G007357/1] Funding Source: researchfish}},
Funding-Text = {{We would like to thank the Impact studentship programme, awarded jointly
   by UCL and Diamond Light Source for funding the thesis work of S
   Boseggia. G Nisbet provided excellent instrument support and advice on
   multiple scattering at the I16 beamline. The work in the UK was
   supported through grant EP/J016713/1 from the EPSRC, and in Denmark by
   the Nordea Fonden and the Otto Mosteds Fond. We also would like to thank
   F Fabrizi and V I Schnells for helpful discussions.}},
Number-of-Cited-References = {{24}},
Times-Cited = {{62}},
Usage-Count-Last-180-days = {{0}},
Usage-Count-Since-2013 = {{55}},
Journal-ISO = {{J. Phys.-Condes. Matter}},
Doc-Delivery-Number = {{230KK}},
Unique-ID = {{ISI:000325337700002}},
OA = {{Green Published}},
DA = {{2020-12-22}},
}