The effects of intra-dimer Dzyaloshinsky–Moriya interaction on the properties of SrCu2(BO3)2 in an external magnetic field
The effects of intra-dimer Dzyaloshinsky–Moriya interaction on the properties of SrCu2(BO3)2 in an external magnetic field
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二聚体内 Dzyaloshinsky-Moriya 相互作用对 SrCu2(BO3)2 在外部磁场中性能的影响
DOI：
10.1088/0953-8984/16/11/048
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发表时间：
2004
期刊：
影响因子：
--
通讯作者：
Y. Ueda
中科院分区：
文献类型：
--
作者：
S. Miyahara;F. Mila;K. Kodama;M. Takigawa;M. Horvatić;C. Berthier;H. Kageyama;Y. Ueda
二维自旋能隙系统SrCu 2 (BO 3 ) 2 由于其低维性和非常特殊的拓扑而产生的强量子涨落而显示出独特的物理性质。这种材料的磁性，例如二聚体单重态基态、几乎局域三重态和磁化平台，可以通过正交二聚体晶格上的自旋 1/2 反铁磁海森堡模型很好地描述。最近，通过核磁共振观察到，B 位的位移与在（110）平面内旋转的外部磁场存在不寻常的角度依赖性，这表明存在场感应交错矩。这种行为不能仅用海森堡模型来解释。我们在正交二聚体模型中包含了二聚体内 Dzyaloshinsky-Moriya 相互作用以及各向异性旋磁张量，并且我们表明观察到的场诱导交错矩可以用物理上合理的参数值很好地描述。
The two-dimensional spin-gap system SrCu 2 (BO 3 ) 2 shows unique physical properties due to the strong quantum fluctuations that follow from its low-dimensionality and its very special topology. The magnetic properties of this material, e.g. dimer singlet ground state, an almost localized triplet and magnetization plateaux, are well described by a spin-1/2 antiferromagnetic Heisenberg model on the orthogonal dimer lattice. Recently, an unusual angular dependence of the shifts at the B sites with the external magnetic field rotated in the (110) plane, which indicates the presence of a field-induced staggered moment, has been observed by nuclear magnetic resonance. Such a behaviour cannot be explained by the Heisenberg model alone. We include an intra-dimer Dzyaloshinsky-Moriya interaction as well as an anisotropic gyromagnetic tensor in the orthogonal dimer model, and we show that the observed field-induced staggered moment can be very well described with physically reasonable values of the parameters.
影响因子：
8.6
作者：
Dender, DC;Hammar, PR;Aeppli, G
通讯作者：
Aeppli, G