Nature of the magnetic order in the charge-ordered cuprate La1.48Nd0.4Sr0.12CuO4.
Nature of the magnetic order in the charge-ordered cuprate La1.48Nd0.4Sr0.12CuO4.
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DOI：
10.1103/physrevlett.98.197003
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发表时间：
2006-08
影响因子：
8.6
通讯作者：
N. Christensen;H. Rønnow;J. Mésot;R. Ewings;N. Momono;M. Oda;M. Ido;M. Enderle;D. McMorrow;A. Boothroyd
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文献类型：
--
作者：
N. Christensen;H. Rønnow;J. Mésot;R. Ewings;N. Momono;M. Oda;M. Ido;M. Enderle;D. McMorrow;A. Boothroyd
利用极化中子散射，我们确定了La（1.48）Nd（0.4）Sr（0.12）CuO（4）中的磁序是（i）一维调制和共线的，与条纹模型一致;（ii）二维调制的，具有一种新的非共线结构。这些测量排除了一些以2D电子序或1D螺旋自旋序为特征的替代模型。低能量自旋激发被发现主要是横向极化相对于条纹有序状态，与传统的自旋波。
Using polarized neutron scattering we establish that the magnetic order in La(1.48)Nd(0.4)Sr(0.12)CuO(4) is either (i) one dimensionally modulated and collinear, consistent with the stripe model or (ii) two dimensionally modulated with a novel noncollinear structure. The measurements rule out a number of alternative models characterized by 2D electronic order or 1D helical spin order. The low-energy spin excitations are found to be primarily transversely polarized relative to the stripe ordered state, consistent with conventional spin waves.