Theory of spin-density profile and lattice distortion in the magnetization plateaus of SrCu2(BO3)2 -: art. no. 024401
Theory of spin-density profile and lattice distortion in the magnetization plateaus of SrCu2(BO3)2 -: art. no. 024401
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DOI：
10.1103/physrevb.68.024401
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发表时间：
2003-07-01
影响因子：
3.7
通讯作者：
Mila, F
中科院分区：
文献类型：
--
作者：
Miyahara, S;Becca, F;Mila, F
二维自旋隙体系SrCu2(BO3)(2)由于其低维性和强量子涨落而表现出独特的物理性质。实验结果表明，在70 T的磁场下，磁化曲线出现1/8、1/4和1/3的高原，在更高的磁场下，1/2的高原有望趋于稳定。我们认为自旋晶格效应是描述高原处自旋密度分布的必要条件，并提出了一个自旋与晶格绝热相互作用的简单微观模型，以再现最近核磁共振实验结果的主要特征。
The two-dimensional spin-gap system SrCu2(BO3)(2) shows unique physical properties due to the low-dimensionality character and the strong quantum fluctuations. Experimentally, 1/8, 1/4, and 1/3 plateaus have been observed in the magnetization curve under magnetic fields up to 70 T, and the 1/2 plateau is expected to be stabilized at higher magnetic fields. We argue that spin-lattice effects are necessary to describe the spin density profile at the plateaus, and we propose a simple microscopic model of spins interacting adiabatically with the lattice to reproduce the main features of the recent experimental results by nuclear magnetic resonance.