Journal article

Dimensionality-Controlled Insulator-Metal Transition and Correlated Metallic State in 5d Transition Metal Oxides Sr₊₁IrnO₃₊₁ (n=1, 2, and ∞)

  • Moon, S. J. ReCOE & FPRD, Department of Physics and Astronomy, Seoul National University, Korea
  • Jin, H. CSCMR & FPRD, Department of Physics and Astronomy, Seoul National University, Korea
  • Kim, Kyung Wan Department of Physics and Fribourg Center for Nanomaterials, University of Fribourg, Switzerland
  • Choi, W. S. ReCOE & FPRD, Department of Physics and Astronomy, Seoul National University, Korea
  • Lee, Y. S. Department of Physics, Soongsil University, Seoul Korea
  • Yu, J. CSCMR & FPRD, Department of Physics and Astronomy, Seoul National University, Korea
  • Cao, G. Department of Physics and Astronomy, University of Kentucky, Lexington, USA
  • Sumi, A. Department of Innovative and Engineered Materials, Interdisciplinary Graduate School of Science and Engineering, Tokyo Institute of Technology, Yokohama, Japan
  • Funakubo, H. Department of Innovative and Engineered Materials, Interdisciplinary Graduate School of Science and Engineering, Tokyo Institute of Technology, Yokohama, Japan
  • Bernhard, Christian Department of Physics and Fribourg Center for Nanomaterials, University of Fribourg, Switzerland
  • Noh, T. W. ReCOE & FPRD, Department of Physics and Astronomy, Seoul National University, Korea
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    24.11.2008
Published in:
  • Physical Review Letters. - 2008, vol. 101, no. 22, p. 226402
English We investigated the electronic structures of the 5d Ruddlesden-Popper series Sr₊₁IrnO₃₊₁ (n=1, 2, and ∞) using optical spectroscopy and first-principles calculations. As 5d orbitals are spatially more extended than 3d or 4d orbitals, it has been widely accepted that correlation effects are minimal in 5d compounds. However, we observed a Mott insulator-metal transition with a change of bandwidth as we increased n. In addition, the artificially synthesized perovskite SrIrO₃ showed a very large mass enhancement of about 6, indicating that it was in a correlated metallic state.
Faculty
Faculté des sciences
Department
Physique
Language
  • English
Classification
Physics
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https://folia.unifr.ch/unifr/documents/300912
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