Giant Magneto-electric Effect in the Novel Mott Insulator, Sr2IrO4

S. Chikara; O. Korneta; W. P. Crummett; L. E. DeLong; P. Schlottmann; G. Cao

doi:10.1063/1.3362912

Giant Magneto-electric Effect in the Novel Mott Insulator, Sr2IrO4

Strongly Correlated Electrons 2015-05-13 v1

Authors: S. Chikara , O. Korneta , W. P. Crummett , L. E. DeLong , P. Schlottmann , G. Cao

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Abstract

Our magnetic, electrical, and thermal measurements on single-crystals of the novel Mott insulator, Sr2IrO4, reveal a novel giant magneto-electric effect (GME) arising from a frustrated magnetic/ferroelectric state whose signatures are: (1) a strongly enhanced electric permittivity that peaks near a newly observed magnetic anomaly at 100 K, (2) a large (~100%) magneto-dielectric shift that occurs near a metamagnetic transition, and (3) magnetic and electric polarization hysteresis. The GME and electric polarization hinge on a spin-orbit gapping of 5d-bands, rather than the magnitude and spatial dependence of magnetization, as traditionally accepted.

Keywords

giant magneto-electric effect mott insulator sr2iro4 spin-orbit coupling multiferroics frustrated magnetism

Cite

@article{arxiv.0908.0773,
  title  = {Giant Magneto-electric Effect in the Novel Mott Insulator, Sr2IrO4},
  author = {S. Chikara and O. Korneta and W. P. Crummett and L. E. DeLong and P. Schlottmann and G. Cao},
  journal= {arXiv preprint arXiv:0908.0773},
  year   = {2015}
}

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Giant Magneto-electric Effect in the Novel Mott Insulator, Sr2IrO4

Abstract

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