Pseudospin-lattice coupling in the spin-orbit Mott insulator Sr2IrO4

@article{ ISI:000458859100002,
Author = {Porras, J. and Bertinshaw, J. and Liu, H. and Khaliullin, G. and Sung,
   N. H. and Kim, J-W and Francoual, S. and Steffens, P. and Deng, G. and
   Sala, M. Moretti and Efimenko, A. and Said, A. and Casa, D. and Huang,
   X. and Gog, T. and Kim, J. and Keimer, B. and Kim, B. J.},
Title = {{Pseudospin-lattice coupling in the spin-orbit Mott insulator Sr2IrO4}},
Journal = {{PHYSICAL REVIEW B}},
Year = {{2019}},
Volume = {{99}},
Number = {{8}},
Month = {{FEB 15}},
Abstract = {{Spin-orbit entangled magnetic dipoles, often referred to as pseudospins,
   provide a new avenue to explore novel magnetism inconceivable in the
   weak spin-orbit coupling limit, but the nature of their low-energy
   interactions remains to be understood. We present a comprehensive study
   of the static magnetism and low-energy pseudospin dynamics in the
   archetypal spin-orbit Mott insulator Sr2IrO4. We find that in order to
   understand even basic magnetization measurements, a formerly overlooked
   in-plane anisotropy is fundamental. In addition to magnetometry, we use
   neutron diffraction, inelastic neutron scattering, and resonant elastic
   and inelastic x-ray scattering to identify and quantify the interactions
   that determine the global symmetry of the system and govern the linear
   responses of pseudospins to external magnetic fields and their
   low-energy dynamics. We find that a pseudospin-only Hamiltonian is
   insufficient for an accurate description of the magnetism in Sr2IrO4 and
   that pseudospin-lattice coupling is essential. This finding should be
   generally applicable to other pseudospin systems with sizable orbital
   moments sensitive to anisotropic crystalline environments.}},
Publisher = {{AMER PHYSICAL SOC}},
Address = {{ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA}},
Type = {{Article}},
Language = {{English}},
Affiliation = {{Kim, BJ (Corresponding Author), Max Planck Inst Festkorperforsch, Heisenbergstr 1, D-70569 Stuttgart, Germany.
   Kim, BJ (Corresponding Author), Pohang Univ Sci & Technol, Dept Phys, Pohang 790784, South Korea.
   Kim, BJ (Corresponding Author), Ctr Artificial Low Dimens Elect Syst, Inst Basic Sci, 77 Cheongam Ro, Pohang 790784, South Korea.
   Porras, J.; Bertinshaw, J.; Liu, H.; Khaliullin, G.; Sung, N. H.; Keimer, B.; Kim, B. J., Max Planck Inst Festkorperforsch, Heisenbergstr 1, D-70569 Stuttgart, Germany.
   Kim, J-W; Said, A.; Casa, D.; Huang, X.; Gog, T.; Kim, J., Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA.
   Francoual, S., DESY, D-22603 Hamburg, Germany.
   Steffens, P., Inst Laue Langevin 6, Rue Jules Horowitz,Boite Postale 156, F-38042 Grenoble 9, France.
   Deng, G., Australian Nucl Sci & Technol Org, Lucas Height, NSW 2233, Australia.
   Sala, M. Moretti; Efimenko, A., European Synchrotron Radiat Facil, Boite Postale 220, F-38043 Grenoble, France.
   Sala, M. Moretti, Politecn Milan, Dipartimento Fis, Piazza Leonardo da Vinci 32, I-20133 Milan, Italy.
   Kim, B. J., Pohang Univ Sci & Technol, Dept Phys, Pohang 790784, South Korea.
   Kim, B. J., Ctr Artificial Low Dimens Elect Syst, Inst Basic Sci, 77 Cheongam Ro, Pohang 790784, South Korea.}},
DOI = {{10.1103/PhysRevB.99.085125}},
Article-Number = {{085125}},
ISSN = {{2469-9950}},
EISSN = {{2469-9969}},
Keywords-Plus = {{EXCHANGE}},
Research-Areas = {{Materials Science; Physics}},
Web-of-Science-Categories  = {{Materials Science, Multidisciplinary; Physics, Applied; Physics,
   Condensed Matter}},
Author-Email = {{bjkim6@postech.ac.kr}},
ResearcherID-Numbers = {{Moretti, Marco/AAF-9255-2019
   Liu, Huimei/P-4919-2019}},
ORCID-Numbers = {{Moretti, Marco/0000-0002-9744-9976
   }},
Funding-Acknowledgement = {{DOE Office of ScienceUnited States Department of Energy (DOE)
   {[}DE-AC02-06CH11357];  {[}IBS-R014-A2]}},
Funding-Text = {{We are grateful to S. Park and H. Kim for their assistance during the
   RMXS measurements. This work was supported by IBS-R014-A2. This research
   used resources 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 = {{49}},
Times-Cited = {{16}},
Usage-Count-Last-180-days = {{1}},
Usage-Count-Since-2013 = {{40}},
Journal-ISO = {{Phys. Rev. B}},
Doc-Delivery-Number = {{HL6QC}},
Unique-ID = {{ISI:000458859100002}},
OA = {{Green Published}},
DA = {{2020-12-22}},
}