Mott-Insulator to Charge-Transferred Insulator Transition in the Strongly Correlated Oxide BaIrO3

• NAKANO Tomohito

  Department of Applied Physics, Waseda University CREST, Japan Science and Technology Agency

Bibliographic Information

Other Title

• 強相関酸化物　ＢａＩｒＯ３　におけるモット絶縁体‐電荷移動型絶縁体転移の圧力効果
• 強相関酸化物BaIrO3におけるモット絶縁体-電荷移動型絶縁体転移の圧力効果
• キョウ ソウカン サンカブツ BaIrO3 ニ オケル モット ゼツエンタイ デンカ イドウガタ ゼツエンタイ テンイ ノ アツリョク コウカ

Abstract

The strongly correlated Ir oxide BaIrO₃ shows a weak ferromagnetism and a gap-type order below the transition temperature Tc(= 180 K at ambient pressure). An external pressure decreases Tc by a rate of -29 K/GPa, removes the metallic conduction below Tc, and suppresses the nonlinear conduction at 4.2 K. These observations are highly incompatible with a charge-density-wave state that was believed to be the origin for the 180-K transition. An alternative model for the transition is proposed, which can be regarded as a transition from the Mott-insulator to the charge-transferred insulator transition.

Journal

• The Review of High Pressure Science and Technology

  The Review of High Pressure Science and Technology 18 (1), 62-68, 2008

  The Japan Society of High Pressure Science and Technology

Keywords

• BaIrO<SUB>3</SUB>
• nonlinear conductivity
• novel transition
• Mott insulator
• Charge transferred insulator
• piston cylinder
• cubic anvil
• pressure

Details

• CRID: 1390282679357448704
• NII Article ID: 10021153341
• NII Book ID: AN10452913
• DOI: 10.4131/jshpreview.18.62
• ISSN: 13481940
• ISSN: 0917639X
• NDL BIB ID: 9422699
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I9422699
• Text Lang: ja
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed