Very-low-frequency excitations in frustrated two-dimensional S = 1/2 Heisenberg antiferromagnets.
Very-low-frequency excitations in frustrated two-dimensional S = 1/2 Heisenberg antiferromagnets.
复制标题
受挫二维 S = 1/2 海森堡反铁磁体中的极低频激励。
DOI：
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发表时间：
2001
影响因子：
8.6
通讯作者：
P. Millet
中科院分区：
文献类型：
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作者：
P. Carretta;R. Melzi;N. Papinutto;P. Millet
本文报道了正方晶格上二维S = 1/2海森堡反铁磁体的μ子自旋共振和~ 7 Li核磁共振弛豫测量结果。据发现，在Li 2 VOSiO 4和Li 2 VOGeO 4，自旋动力学在低于海森堡交换频率的频率数量级。这些动力学与分离共存共线域的壁的运动相关联，磁波矢量旋转90度。
Muon spin resonance and 7Li NMR relaxation measurements in frustrated two-dimensional S = 1/2 Heisenberg antiferromagnets on a square lattice are presented. It is found that, in both Li2VOSiO4 and Li2VOGeO4, spin dynamics at frequencies orders of magnitude below the Heisenberg exchange frequency are present. These dynamics are associated with the motions of walls separating coexisting collinear domains with a magnetic wave vector rotated by 90 degrees.