Dilute Magnetism and Spin-Orbital Percolation Effects in Rh-doped Sr2IrO4

J. P. Clancy; A. Lupascu; H. Gretarsson; Z. Islam; Y. F. Hu; D. Casa; C. S. Nelson; S. C. Lamarra; G. Cao; Young-June Kim

doi:10.1103/PhysRevB.89.054409

Dilute Magnetism and Spin-Orbital Percolation Effects in Rh-doped Sr2IrO4

Strongly Correlated Electrons 2014-02-12 v2

Authors: J. P. Clancy , A. Lupascu , H. Gretarsson , Z. Islam , Y. F. Hu , D. Casa , C. S. Nelson , S. C. Lamarra , G. Cao , Young-June Kim

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Abstract

We have used a combination of resonant magnetic x-ray scattering (RMXS) and x-ray absorption spectroscopy (XAS) to investigate the properties of the doped spin-orbital Mott insulator Sr2Ir(1-x)Rh(x)O4 (0.07 < x < 0.70). We show that Sr2Ir(1-x)Rh(x)O4 represents a unique model system for the study of dilute magnetism in the presence of strong spin-orbit coupling, and provide evidence of a doping-induced change in magnetic structure and a suppression of magnetic order at x_c ~ 0.17. We demonstrate that Rh-doping introduces Rh3+/Ir5+ ions which effectively hole-dope this material. We propose that the magnetic phase diagram for this material can be understood in terms of a novel spin-orbital percolation picture.

Keywords

dilute magnetism spin-orbit coupling mott insulator resonant magnetic x-ray scattering x-ray absorption spectroscopy spin-orbital percolation sr2iro4

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@article{arxiv.1311.0039,
  title  = {Dilute Magnetism and Spin-Orbital Percolation Effects in Rh-doped Sr2IrO4},
  author = {J. P. Clancy and A. Lupascu and H. Gretarsson and Z. Islam and Y. F. Hu and D. Casa and C. S. Nelson and S. C. Lamarra and G. Cao and Young-June Kim},
  journal= {arXiv preprint arXiv:1311.0039},
  year   = {2014}
}

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9 pages, 7 figures

Dilute Magnetism and Spin-Orbital Percolation Effects in Rh-doped Sr2IrO4

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