Probing Novel States of Iridates and Ruthenates under Extreme Conditions

ORAL

Abstract

The highly delicate balance between competing energies in materials of interest makes high-pressure and high-magnetic-field powerful probes for generating novel states. Our studies have uncovered a number of remarkable properties of iridates and ruthenates under extreme conditions: avoidance of metallization at high pressures, absent conventional correlations between magnetic and insulating states in iridates; coexistence of a bulk insulating state and quantum oscillations period in 1/B or B (depending on the orientation of B which is applied magnetic field), and colossal magnetoresistivity without spin polarization in ruthenates. We will present and discuss our results with comparison drawn with relevant systems.

*This work was supported by NSF via a grant DMR-1265162

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Authors

  • Shujuan Yuan

    • Center for Advanced Materials and Department of Physics and Astronomy, University of Kentucky, Lexington, KY 40506, USA
    • Center for Advanced Materials, Department of Physics and Astronomy, University of Kentucky, Lexington, Kentucky 40506, USA

  • H. Zheng

    • Center for Advanced Materials and Department of Physics and Astronomy, University of Kentucky, Lexington, KY 40506, USA
    • Center for Advanced Materials and Department of Physics and Astronomy University of Kentucky, Lexington, KY 40506, USA

  • Panpan Kong

    • Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China

  • Chanqing Jin

    • Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China

  • Daniel Haskel

    • Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439, USA

  • Oleksandr Korneta

    • Center for Correlated Electron Systems, Institute for Basic Science (IBS), Seoul National University, Seoul 151-742, Korea

  • Shujuan Yuan

    • Center for Advanced Materials and Department of Physics and Astronomy, University of Kentucky, Lexington, KY 40506, USA

  • Gang Cao

    • Center for Advanced Materials and Department of Physics and Astronomy, University of Kentucky, Lexington, KY 40506, USA