Non-linear soliton excitations in antiferromagnetic chains
Non-linear soliton excitations in antiferromagnetic chains
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反铁磁链中的非线性孤子激发
DOI：
10.1007/bf02405154
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发表时间：
1989
影响因子：
--
通讯作者：
J. Boucher
中科院分区：
文献类型：
--
作者：
J. Boucher
拓扑激发在反铁磁链中起着至关重要的作用。在这篇综述中，我们主要关注由这些准粒子引起的动力学涨落，试图说明它们是如何在实验上被观察到的。特别是，脉冲核磁共振技术可以在很低的频率下探测到这些波动。在同样的背景下，简要提到了中子自旋回波(NSE)测量。文中还对孤子磁共振(SMR)测量进行了讨论：它们揭示了孤子(双子)内部进动的存在，并表明可以直接探测到均匀(Q=0)孤子模。对三种化合物TMMC和CsCoCl3的实验数据进行了讨论，其中TMMC为“宽”孤子提供了良好的范例，CsCoCl3为“窄”孤子提供了很好的范例。在霍尔丹猜想的背景下，讨论了用NENP获得的核磁共振数据。
Topological excitations play a crucial role in antiferromagnetic chains. In the present review, we focus on the dynamical fluctuations induced by these quasi-particles, trying to show how they can be observed experimentally. In particular the pulsed nuclear magnetic resonance (NMR) technique can probe these fluctuations at very low frequency. In the same context, neutron spin echo (NSE) measurements are briefly mentioned. A discussion of soliton magnetic resonance (SMR) measurements in also presented: they reveal the existence of internal precessions in the solitons (Dyons) and they show that the uniform (q=0) soliton modes can be detected directly. The experimental data to be discussed were obtained on three compounds: TMMC which provides good examples for “broad” solitons and CsCoCl3for “narrow” solitons. A discussion of NMR data obtained with NENP is given in the context of the Haldane's conjecture.