Giant magnetoelectric effect in the Jeff = 1/2 Mott insulator Sr2IrO4

S. Chikara, O. Korneta, W. P. Crummett, L. E. Delong, P. Schlottmann, G. Cao

Research output: Contribution to journalArticlepeer-review

113 Scopus citations

Abstract

Our magnetic, electrical, and thermal measurements on single crystals of the Jeff =1/2 Mott insulator, Sr2 IrO4, reveal a giant magnetoelectric effect (GME) arising from a frustrated magnetic/ferroelectric state whose signatures are: (1) a strongly enhanced electric permittivity that peaks near an observed magnetic anomaly at 100 K, and (2) a large (∼100%) magnetodielectric shift that occurs near a metamagnetic transition. The GME hinges on a spin-orbit gapping of 5d bands rather than the magnitude and spatial dependence of magnetization, as traditionally accepted.

Original languageEnglish
Article number140407
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume80
Issue number14
DOIs
StatePublished - Oct 19 2009

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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