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Dynamic spin fluctuations in the frustrated A-site spinel CuAl_2O_4

机译:令人沮丧的A-PINTEL CUAL_2O_4中的动态旋转波动

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摘要

We performed nuclear magnetic resonance (NMR) and muon spin relaxation (μSR) experiments to identify the magnetic ground state of the frustrated quantum A-site spinel, CuAl_2O_4. Our results verify that the ground state does not exhibit a long-range magnetic ordering, but a glasslike transition manifests at T* = 2.3 K. However, the Gaussian shape and the weak longitudinal Field dependence of μSR spectra below T* show that the ground state has dynamic spin fluctuations, distinct from those of conventional spin glasses.
机译:我们进行了核磁共振(NMR)和μs旋转弛豫(μSR)实验,以识别令人沮丧的量子尖晶石,Cual_2O_4的磁场地位。我们的结果验证了地位不表现出远程磁性排序,而是在T * = 2.3k下表现出玻璃状过渡表现。然而,高斯形状和μSR光谱下方的μSR光谱的弱纵向场依赖性显示地面状态具有动态的旋转波动,与传统的旋转眼镜不同。

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  • 来源
    《Physical review》 |2020年第1期|014439.1-014439.11|共11页
  • 作者单位

    Clarendon Laboratory & Physics Department University of Oxford Parks Road Oxford OX1 3PU United Kingdom Department of Physics & Astronomy Seoul National University Seoul 08826 Korea Center for Correlated Electron Systems Institute for Basic Science Seoul 08826 Korea;

    Department of Physics Indian Institute of Technology Madras Chennai 600 036 India;

    Department of Physics & Astronomy Seoul National University Seoul 08826 Korea Center for Correlated Electron Systems Institute for Basic Science Seoul 08826 Korea;

    ISIS Facility STFC Rutherford Appleton Laboratory Harwell Oxford Oxfordshire OX11 0QX United Kingdom;

    Institute for Solid State Physics (ISSP) University of Tokyo Kashiwa Chiba 277-8581 Japan;

    Institute for Solid State Physics (ISSP) University of Tokyo Kashiwa Chiba 277-8581 Japan;

    Clarendon Laboratory & Physics Department University of Oxford Parks Road Oxford OX1 3PU United Kingdom;

    Institute for Solid State Physics (ISSP) University of Tokyo Kashiwa Chiba 277-8581 Japan;

    ISIS Facility STFC Rutherford Appleton Laboratory Harwell Oxford Oxfordshire OX11 0QX United Kingdom Highly Correlated Matter Research Group Physics Department University of Johannesburg P.O. Box 524 Auckland Park 2006 South Africa;

    Department of Physics & Astronomy Seoul National University Seoul 08826 Korea Center for Correlated Electron Systems Institute for Basic Science Seoul 08826 Korea Center for Quantum Materials Institute for Basic Science Seoul 08826 Korea;

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