2011年4月
Ba2IrO4: A spin-orbit Mott insulating quasi-two-dimensional antiferromagnet
PHYSICAL REVIEW B
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- 巻
- 83
- 号
- 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
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- 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
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- 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