Christensen N B, Rønnow H M, Mesot J, Ewings R A, Momono N, Oda M, Ido M, Enderle M, McMorrow D F, Boothroyd A T
Laboratory for Neutron Scattering, ETH Zurich & Paul Scherrer Institute, CH-5232 Villigen PSI, Switzerland.
Phys Rev Lett. 2007 May 11;98(19):197003. doi: 10.1103/PhysRevLett.98.197003. Epub 2007 May 8.
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.
通过极化中子散射，我们确定La(1.48)Nd(0.4)Sr(0.12)CuO(4)中的磁序要么是(i) 一维调制且共线的，与条纹模型一致，要么是(ii) 二维调制且具有新颖的非共线结构。这些测量排除了许多以二维电子序或一维螺旋自旋序为特征的替代模型。发现低能自旋激发相对于条纹有序态主要是横向极化的，这与传统自旋波一致。
