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arXiv 0903.1234cond-mat.str-elcond-mat.stat-mech
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低维自旋能隙材料中杂质诱导的磁有序

Impurity-induced magnetic order in low dimensional spin gapped materials

J. Bobroff, N. Laflorencie, L. K. Alexander, A. V. Mahajan, B. Koteswararao, P. Mendels

摘要:

我们利用~(31)P NMR、μ SR和量子蒙特卡罗模拟研究了非磁性Zn杂质对Bi(Cu_(1-x)Zn_x)_2 PO_6的影响.我们的研究结果表明,杂质诱导在其附近的反铁磁极化,延伸到几个单位电池。在低温下,这些延长的时刻冻结在一个过程中,这是发现普遍存在于各种其他自旋间隙的化合物:孤立的梯子,Haldom或Spin-Peierls链。这使我们能够提出一个简单的共同框架来解释在低维自旋能隙材料中观察到的一般低温杂质诱导冻结。

英文摘要:

We have studied the effect of non-magnetic Zn impurities in the coupled spin-ladder Bi(Cu1xZnx)2PO6 using 31P NMR, muSR and Quantum Monte Carlo simulations. Our results show that the impurities induce in their vicinity antiferromagnetic polarizations, extending over a few unit cells. At low temperature, these extended moments freeze in a process which is found universal among various other spin-gapped compounds: isolated ladders, Haldane or Spin-Peierls chains. This allows us to propose a simple common framework to explain the generic low-temperature impurity induced freezings observed in low dimensional spin-gapped materials.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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