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Evolution of phonon Raman spectra with orbital ordering in spinel MnV_2O_4

机译:尖晶石MnV_2O_4轨道声子拉曼光谱的演化。

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摘要

We investigated Raman scattering of spinel MnV_2O_4, for which orbital ordering of V t_(2g). states below T_c = 57 K was proposed. Several peaks evolve in the Raman spectra below T_c, and they show a peculiar polarization dependence, which cannot be explained only by a group theory analysis. We found that it can be explained by considering Mott excitations in Che presence of orbital ordering as the dominant intermediate states in the Raman process. This result gives the evidence of orbital ordering in this compound from the viewpoint of electronic structure.
机译:我们研究了尖晶石MnV_2O_4的拉曼散射,其轨道顺序为V t_(2g)。提出了低于T_c = 57 K的状态。在T_c以下的拉曼光谱中会出现几个峰,并且它们显示出特殊的偏振相关性,这不能仅通过群论分析来解释。我们发现,可以通过考虑在轨道存在的Che的Mott激发作为拉曼过程中的主要中间态来解释。从电子结构的角度来看,该结果提供了该化合物中轨道有序的证据。

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  • 来源
    《Physical review》 |2011年第9期|p.094406.1-094406.8|共8页
  • 作者单位

    Department of Physics, Waseda University, Tokyo 169-8555, Japan;

    Department of Physics, Waseda University, Tokyo 169-8555, Japan;

    Department of Physics, Waseda University, Tokyo 169-8555, Japan;

    Department of Physics, Waseda University, Tokyo 169-8555, Japan;

    Multiferroics Project (MF), ERATO, Japan Science and Technology Agency, Tokyo 113-8656, Japan;

    Multiferroics Project (MF), ERATO, Japan Science and Technology Agency, Tokyo 113-8656, Japan,Department of Physics and Mathematics, Aoyama Gakuin University, Kanagawa 229-8558. Japan;

    Department of Physics, Waseda University, Tokyo 169-8555, Japan,Kagami Memorial Laboratory for Material Science and Technology, Waseda University, Tokyo 169-0051, Japan,PRESTO, Japan Science and Technology Corporation, Saitama 332-0012, Japan;

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  • 正文语种 eng
  • 中图分类
  • 关键词

    ferrimagnetics; other nonmetallic inorganics;

    机译:亚铁磁;其他非金属无机物;

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