Correlated Dirac semimetallic state with unusual positive magnetoresistance in strain-free perovskite SrIrO3

J. Fujioka, T. Okawa, Ayako Yamamoto, Y. Tokura

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We investigated magnetotransport properties and charge dynamics of strain-free perovskite SrIrO3. Both the longitudinal and transverse magnetoresistivity (MR) are significantly enhanced with decreasing temperature, in accord with the evolution of the Dirac semimetallic state. The electron correlation effect in the Dirac state shows up as a dramatic change in charge dynamics with temperature and as an enhanced paramagnetic susceptibility. We propose that the field-induced topological transition of the Dirac node coupled to the enhanced paramagnetism causes the unique MR of correlated Dirac electrons.

Original languageEnglish
Article number121102
JournalPhysical Review B
Issue number12
Publication statusPublished - 2017 Mar 3
Externally publishedYes


ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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