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Spinon confinement in the one-dimensional Ising-like antiferromagnet SrCo_2V_2O_8

机译:一维Ising型反铁磁体SrCo_2V_2O_8中的旋子禁闭

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摘要

For quasi-one-dimensional quantum spin systems theory predicts the occurrence of a confinement of spinon excitation due to interchain couplings. Here we investigate the system SrCo_2V_2O_8, a realization of the weakly coupled Ising-like XXZ antiferromagnetic chains, by terahertz spectroscopy with and without applied magnetic field. At low temperatures a series of excitations is observed, which split in a Zeeman-like fashion in an applied magnetic field. These magnetic excitations are identified as the theoretically predicted spinon-pair excitations. Using a one-dimensional Schrodinger equation with a linear confinement potential imposed by weak interchain couplings, the hierarchy of the confined spinons can be fully described.
机译:对于准一维量子自旋系统,理论预测了由于链间耦合而发生的自旋激发的局限。在这里,我们研究了系统TrCo_2V_2O_8,该系统通过太赫兹光​​谱在有或没有施加磁场的情况下实现了弱耦合的类似于Ising的XXZ反铁磁链。在低温下,观察到一系列激励,这些激励在施加的磁场中以类似于塞曼的方式分裂。这些磁激发被识别为理论上预测的旋子对激发。使用一维Schrodinger方程,该方程具有由弱链间耦合施加的线性约束电位,可以充分描述约束尖刺的层次。

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  • 来源
    《Physical review》 |2015年第14期|140404.1-140404.4|共4页
  • 作者单位

    Experimental Physics Ⅴ, Center for Electronic Correlations and Magnetism, Institute of Physics, University of Augsburg, 86135 Augsburg, Germany;

    Experimental Physics Ⅴ, Center for Electronic Correlations and Magnetism, Institute of Physics, University of Augsburg, 86135 Augsburg, Germany;

    Helmholtz-Zentrum Berlin fuer Materialien und Energie, 14109 Berlin, Germany;

    Helmholtz-Zentrum Berlin fuer Materialien und Energie, 14109 Berlin, Germany;

    Helmholtz-Zentrum Berlin fuer Materialien und Energie, 14109 Berlin, Germany,Institut fuer Festkoerperphysik, Technische Universitaet Berlin, 10623 Berlin, Germany;

    Experimental Physics Ⅴ, Center for Electronic Correlations and Magnetism, Institute of Physics, University of Augsburg, 86135 Augsburg, Germany;

    Experimental Physics Ⅴ, Center for Electronic Correlations and Magnetism, Institute of Physics, University of Augsburg, 86135 Augsburg, Germany;

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  • 正文语种 eng
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  • 关键词

    intrinsic properties of magnetically ordered materials; spin-orbit coupling, zeeman and stark splitting, jahn-teller effect; spin chain models;

    机译:磁性有序材料的固有特性;自旋轨道耦合;塞曼和斯塔克分裂;詹恩-泰勒效应;自旋链模型;

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