Evidence for spin solitons and their dynamics in a spin-Peierls system (DMe-DCNQI)2Li
Evidence for spin solitons and their dynamics in a spin-Peierls system (DMe-DCNQI)2Li
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自旋 Peierls 系统 (DMe-DCNQI)2Li 中自旋孤子及其动力学的证据
DOI：
10.1103/physrevb.65.174413
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发表时间：
2002
影响因子：
3.7
通讯作者：
R. Kato
中科院分区：
文献类型：
--
作者：
M. Hiraoka;H. Sakamoto;K. Mizoguchi;R. Kato
用电子顺磁共振~EPR！研究了自旋-Peierls体系(DME-DCNQI)2Li。在静水压力下。在TSP下方观察到居里自旋的EPR线宽与频率有一定的依赖关系，表现出类似于t-(CH)x的明显的一维扩散特征。这有力地证明了居里自旋是由结构缺陷引起的自旋孤子形成的。自旋孤子的估计范围小于几个分子单位。讨论了与CuGeO_3中的杂质引起的反铁磁有序的关系。
A spin-Peierls system (DMe-DCNQI)2Li has been studied with electron paramagnetic resonance ~EPR! under hydrostatic pressure. A definite frequency dependence of the EPR linewidth is observed for the Curie spins that appear below TSP , demonstrating a clear one-dimensional diffusive character similar to t-(CH)x . This is strong evidence for Curie spins to arise from spin solitons as domain walls caused by structural defects. The estimated extent of the spin soliton is less than several molecular units. A relation with the antiferromagnetic ordering provoked by impurities as found in CuGeO3 is discussed.