金刚石单晶中碳纳米管的铁磁有序性
Ferromagnetic Ordering in Carbon Nanotubes, Incorporated in Diamond Single Crystals
摘要：
通过高能离子束改性金刚石单晶在$\langle{110}\rangle$和$\langle{111}\rangle$两个方向上产生的碳纳米管（NTs）中铁磁有序化机制的物理起源，对观察到的铁磁自旋波共振实验结果进行分析，得出结论：NTs中唯一的$π$ -电子子系统是导致铁磁性出现的原因。这是由Su-Schrieffer-Heeger（SSH）拓扑孤子晶格中自旋密度分布的不对称性决定的。在有机导体的广义SSH模型框架下考虑SSH拓扑孤子晶格的形成，其中$π$ -电子子系统被表示为一维量子费米液体.讨论了高能离子束对金刚石单晶进行$\langle{100}\rangle$方向改性后，在碳纳米管中形成与室温超导性共存的无补偿反铁磁有序的现象。
英文摘要：
The physical origin of the mechanism of the formation of ferromagnetic ordering in carbon nanotubes (NTs), produced by high energy ion beam modification of diamond single crystals in $\langle{110}\rangle$ and $\langle{111}\rangle$ directions has been found. It is concluded from analysis of experimental results on ferromagnetic spin wave resonance observed, that the only $π$-electronic subsystem of given NTs is responsible for the appearance of ferromagnetism. It is determined by asymmetry in spin density distribution in Su-Schrieffer-Heeger (SSH) topological soliton lattice. The formation of SSH topological soliton lattice is considered in the frames of generalized SSH-model of organic conductors, in which $π$-electronic subsystem is represented being to be 1D quantum Fermi liquid. The phenomenon of formation of uncompensated antiferromagnetic ordering coexisting with superconductivity at room temperature in carbon nanotubes, produced by high energy ion beam modification of diamond single crystals in $\langle{100}\rangle$ direction is argued.
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