論文

査読有り
2011年4月

Ba2IrO4: A spin-orbit Mott insulating quasi-two-dimensional antiferromagnet

PHYSICAL REVIEW B
  • H. Okabe
  • ,
  • M. Isobe
  • ,
  • E. Takayama-Muromachi
  • ,
  • A. Koda
  • ,
  • S. Takeshita
  • ,
  • M. Hiraishi
  • ,
  • M. Miyazaki
  • ,
  • R. Kadono
  • ,
  • Y. Miyake
  • ,
  • J. Akimitsu

83
15
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1103/PhysRevB.83.155118
出版者・発行元
AMER PHYSICAL SOC

A layered iridate Ba2IrO4 was synthesized using a high-pressure synthesis technique. Its electronic state was studied through electrical resistivity, magnetic susceptibility, and mu SR experiments. It was found that Ba2IrO4 crystallizes in a K2NiF4-type structure (space group I4/mmm) with lattice parameters a = 4.030(1) angstrom and c = 13.333(4) angstrom. The structure includes flat IrO2 square planar lattices with straight Ir-O-Ir bonds. Ba2IrO4 is a Mott insulator (activation energy Delta E-a similar to 0.07 eV) driven by a spin-orbit interaction. The magnetic susceptibility and mu SR studies revealed that the magnetic ground state is antiferromagnetic long-range order (T-N similar to 240 K) in which the magnetic moment (similar to 0.34 mu(B)/Ir atom) is significantly reduced by a low-dimensional quantum spin fluctuation with a large intraplane correlation vertical bar J vertical bar. The behavior is similar to that in parent materials of high-T-C cuprate superconductors such as La2CuO4.

リンク情報
DOI
https://doi.org/10.1103/PhysRevB.83.155118
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000291642400001&DestApp=WOS_CPL
URL
http://www.scopus.com/inward/record.url?eid=2-s2.0-79961122368&partnerID=MN8TOARS
URL
http://orcid.org/0000-0002-4747-1980
ID情報
  • DOI : 10.1103/PhysRevB.83.155118
  • ISSN : 1098-0121
  • eISSN : 1550-235X
  • ORCIDのPut Code : 64923937
  • SCOPUS ID : 79961122368
  • Web of Science ID : WOS:000291642400001

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