Novel Insulator and Superconductivity in a 5d Electron System of Iridium Oxides(Research)

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Other Title
  • 5d電子系イリジウム酸化物における新奇な絶縁体と超伝導(最近の研究から)
  • 最近の研究から 5d電子系イリジウム酸化物における新奇な絶縁体と超伝導
  • サイキン ノ ケンキュウ カラ 5d デンシケイ イリジウム サンカブツ ニ オケル シンキ ナ ゼツエンタイ ト チョウデンドウ

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Abstract

We have studied a three-orbital Hubbard model to understand the detailed electronic structure of 5d transition metal oxide Sr_2IrO_4. We have shown that the large spin-orbit coupling of 5d electrons induces the novel insulating state, characterized by an effective total angular momentum J_<eff>=1/2. This material is found to be located between Slater and Mott insulators. We have also proposed that the novel superconductivity is induced by electron doping for Sr_2IrO_4.

Journal

  • Butsuri

    Butsuri 70 (1), 31-35, 2015-01-05

    The Physical Society of Japan

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