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Frustration and charge order in LuFe_2O_4

机译:LuFe_2O_4中的挫败感和充电顺序

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摘要

The nature of a transition from two- to three-dimensional charge order (2D-CO→3D-CO) in the multiferroic material LuFe_2O_4 is discussed. It is shown that a high-temperature ordered phase of the Ising model with antiferromagnetic or antiferroelectric (AF) interactions on a triangular bilayer (W layer) is a dimer partially disordered AF (DPDA) state, which is a generalization of a well-known partially disordered AF structure for the triangular lattice. The DPDA state is stable against a variation of interaction parameters in a wide range. It is demonstrated that the transition of W layers to the DPDA state gives rise to the 2D-CO phase in LuFe_2O_4 at a high temperature.
机译:讨论了多铁性材料LuFe_2O_4中二维电荷阶跃到二维电荷阶跃(2D-CO→3D-CO)的性质。结果表明,在三角形双层(W层)上具有反铁磁或反铁电(AF)相互作用的Ising模型的高温有序相为二聚体部分无序AF(DPDA)状态,这是众所周知的一种概括三角形晶格的部分无序AF结构。 DPDA状态在较大范围内对交互参数的变化稳定。已经证明,在高温下,W层向DPDA状态的转变会在LuFe_2O_4中产生2D-CO相。

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  • 来源
    《Physical review》 |2012年第21期|214427.1-214427.4|共4页
  • 作者

    Yu. B. Kudasov; D. A. Maslov;

  • 作者单位

    Sarov Physics and Technology Institute, National Research Nuclear University "MEPhI", Dukhov Strasse 6, Sarov 607188, Russia,Russian Federal Nuclear Center-VNIIEF, Mira Strasse 37, Sarov 607188, Russia;

    Sarov Physics and Technology Institute, National Research Nuclear University "MEPhI", Dukhov Strasse 6, Sarov 607188, Russia,Russian Federal Nuclear Center-VNIIEF, Mira Strasse 37, Sarov 607188, Russia;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    charge-density-wave systems; classical spin models;

    机译:电荷密度波系统;经典自旋模型;

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