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Tuning magnetic coupling in Sr2IrO4 thin films with epitaxial strain.
Lupascu, A; Clancy, J P; Gretarsson, H; Nie, Zixin; Nichols, J; Terzic, J; Cao, G; Seo, S S A; Islam, Z; Upton, M H; Kim, Jungho; Casa, D; Gog, T; Said, A H; Katukuri, Vamshi M; Stoll, H; Hozoi, L; van den Brink, J; Kim, Young-June.
Afiliación
  • Lupascu A; Department of Physics, University of Toronto, 60 St. George Street, Toronto, Ontario M5S 1A7, Canada.
  • Clancy JP; Department of Physics, University of Toronto, 60 St. George Street, Toronto, Ontario M5S 1A7, Canada.
  • Gretarsson H; Department of Physics, University of Toronto, 60 St. George Street, Toronto, Ontario M5S 1A7, Canada.
  • Nie Z; Department of Physics, University of Toronto, 60 St. George Street, Toronto, Ontario M5S 1A7, Canada.
  • Nichols J; Department of Physics and Astronomy, University of Kentucky, Lexington, Kentucky 40506, USA.
  • Terzic J; Department of Physics and Astronomy, University of Kentucky, Lexington, Kentucky 40506, USA.
  • Cao G; Department of Physics and Astronomy, University of Kentucky, Lexington, Kentucky 40506, USA.
  • Seo SS; Department of Physics and Astronomy, University of Kentucky, Lexington, Kentucky 40506, USA.
  • Islam Z; Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439, USA.
  • Upton MH; Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439, USA.
  • Kim J; Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439, USA.
  • Casa D; Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439, USA.
  • Gog T; Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439, USA.
  • Said AH; Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439, USA.
  • Katukuri VM; Institute for Theoretical Solid State Physics, IFW Dresden, Helmholtzstrasse. 20, 01069 Dresden, Germany.
  • Stoll H; Institute for Theoretical Chemistry, Universität Stuttgart, Pfaffenwaldring 55, D-70569 Stuttgart, Germany.
  • Hozoi L; Institute for Theoretical Solid State Physics, IFW Dresden, Helmholtzstrasse. 20, 01069 Dresden, Germany.
  • van den Brink J; Institute for Theoretical Solid State Physics, IFW Dresden, Helmholtzstrasse. 20, 01069 Dresden, Germany.
  • Kim YJ; Department of Physics, University of Toronto, 60 St. George Street, Toronto, Ontario M5S 1A7, Canada.
Phys Rev Lett ; 112(14): 147201, 2014 Apr 11.
Article en En | MEDLINE | ID: mdl-24766006
ABSTRACT
We report x-ray resonant magnetic scattering and resonant inelastic x-ray scattering studies of epitaxially strained Sr2IrO4 thin films. The films were grown on SrTiO3 and (LaAlO3)0.3(Sr2AlTaO6)0.7 substrates, under slight tensile and compressive strains, respectively. Although the films develop a magnetic structure reminiscent of bulk Sr2IrO4, the magnetic correlations are extremely anisotropic, with in-plane correlation lengths significantly longer than the out-of-plane correlation lengths. In addition, the compressive (tensile) strain serves to suppress (enhance) the magnetic ordering temperature TN, while raising (lowering) the energy of the zone-boundary magnon. Quantum chemical calculations show that the tuning of magnetic energy scales can be understood in terms of strain-induced changes in bond lengths.
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Colección: 01-internacional Banco de datos: MEDLINE Idioma: En Revista: Phys Rev Lett Año: 2014 Tipo del documento: Article País de afiliación: Canadá
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Colección: 01-internacional Banco de datos: MEDLINE Idioma: En Revista: Phys Rev Lett Año: 2014 Tipo del documento: Article País de afiliación: Canadá