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首页> 外文期刊>Physical review >Ultrafast dynamics in the Lifshitz-type 5d pyrochlore antiferromagnet Cd_2Os_2O_7
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Ultrafast dynamics in the Lifshitz-type 5d pyrochlore antiferromagnet Cd_2Os_2O_7

机译:Lifshitz-Type 5D Pyrochlore Antiferromagnet CD_2OS_2O_7中的Ultrafast Dynamics

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摘要

We investigate the ultrafast dynamics of Cd2Os2O7, a prototype material showing a Lifshitz-type transition as a function of temperature. In the paramagnetic metallic state, the photoreflectivity shows a subpicosecond relaxation, followed by a featureless small offset. In the antiferromagnetic state slightly below T-N, however, the photoreflectivity resurges over hundreds of picoseconds, which goes beyond the usual realm of the effective-temperature model. Our observations are consistent with the Lifshitz phase transition of Cd2Os2O7 driven by the evolution of the local magnetic moment.
机译:我们研究了CD2OS2O7的超快动态,原型材料,示出了作为温度的函数的Lifshitz型转变的原型材料。在顺磁金属状态下,光反射性显示出杂项弛豫,其次是一个无特色的小偏移。然而,在略低于T-N的反铁磁状态下,光反射性重新恢复超过数百个皮秒,这远远超出了有效温度模型的通常领域。我们的观察结果与由局部磁矩的演变驱动的CD2OS2O7驱动的Lifshitz相转变一致。

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  • 来源
    《Physical review》 |2019年第14期|144309.1-144309.5|共5页
  • 作者单位

    Inst for Basic Sci Korea CCES Seoul 08826 South Korea|Seoul Natl Univ Dept Phys & Astron Seoul 08826 South Korea;

    Inst for Basic Sci Korea CCES Seoul 08826 South Korea|Seoul Natl Univ Dept Phys & Astron Seoul 08826 South Korea|Los Alamos Natl Lab Ctr Integrated Nanotechnol Los Alamos NM 87545 USA;

    Inst for Basic Sci Korea CCES Seoul 08826 South Korea|Seoul Natl Univ Dept Phys & Astron Seoul 08826 South Korea|Sungkyunkwan Univ Dept Energy Sci Suwon 16419 South Korea;

    Inst for Basic Sci Korea CCES Seoul 08826 South Korea|Seoul Natl Univ Dept Phys & Astron Seoul 08826 South Korea;

    Inst for Basic Sci Korea CCES Seoul 08826 South Korea|Seoul Natl Univ Dept Phys & Astron Seoul 08826 South Korea;

    Chungbuk Natl Univ Dept Phys Cheongju 28644 Chungbuk South Korea;

    Tokyo Inst Technol Mat Res Ctr Element Strategy Yokohama Kanagawa 2268503 Japan;

    Univ Tokyo ISSP Kashiwa Chiba 2778581 Japan;

    Inst for Basic Sci Korea CCES Seoul 08826 South Korea|Seoul Natl Univ Dept Phys & Astron Seoul 08826 South Korea;

    Chungbuk Natl Univ Dept Phys Cheongju 28644 Chungbuk South Korea;

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