Simultaneous Metal-Insulator and Antiferromagnetic Transitions in Orthorhombic Perovskite Iridate Sr0.94Ir0.78O2.68 Single Crystals

ORAL

Abstract

We report results of our investigation of bulk single-crystal Sr0.94Ir0.78O2.68 or Ir-deficient, orthorhombic perovskite SrIrO3. It retains the same crystal structure as stoichiometric SrIrO3 but exhibits a sharp, simultaneous antiferromagnetic (AFM) and metal-insulator (MI) transition occurring in the basal-plane resistivity at 185 K. All results including our first-principles calculations underscore a delicacy of the paramagnetic, metallic state in SrIrO3 that is in close proximity to an AFM insulating state.

*This work was supported by NSF through grant DMR- 1265162 0856234 and the Department of Energy (BES) through grant No. DE-FG02- 98ER45707 (PS). G.W. acknowledges support by Natural Science Foundation of China via Grant No.11525417

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Authors

  • H. Zheng

    • Department of Physics, University of Colorado, Boulder, CO

  • J. Terzic

    • Center for Advanced Materials and Department of Physics and Astronomy University of Kentucky, KY

  • F. Ye

    • Quantum Condensed Matter Division, Oak Ridge National Laboratory, TN

  • X. G. Wan

    • Department of Physics, Nanjing University, China

  • D. Wang

    • Department of Physics, Nanjing University, China

  • J. Wang

    • Quantum Condensed Matter Division, Oak Ridge National Laboratory, TN

  • X. P. Wang

    • Chemical and Engineering Materials Division, Oak Ridge National Laboratory, TN

  • P. Schlottmann

    • Department of Physics, Florida State University, FL

  • S. J. Yuan

    • Center for Advanced Materials and Department of Physics and Astronomy University of Kentucky, KY

  • G. Cao

    • Department of Physics, University of Colorado, Boulder, CO