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Ferromagnetic bond of Li-10 cluster: An alternative approach in terms of effective ferromagnetic sites

机译:Li-10团簇的铁磁键:关于有效铁磁部位的另一种方法

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In this work, a model to explain the unusual stability of atomic lithium clusters in their highest spin multiplicity is presented and used to describe the ferromagnetic bonding of high-spin Li-10 and Li-8 clusters. The model associates the (lack of-) fitness of Heisenberg Hamiltonian with the degree of (de-) localization of the valence electrons in the cluster. It is shown that a regular Heisenberg Hamiltonian with four coupling constants cannot fully explain the energy of the different spin states. However, a more simple model in which electrons are located not at the position of the nuclei but at the position of the attractors of the electron localization function succeeds in explaining the energy spectrum and, at the same time, explains the ferromagnetic bond found by Shaik using arguments of valence bond theory. In this way, two different points of view, one more often used in physics, the Heisenberg model, and the other in chemistry, valence bond, come to the same answer to explain those atypical bonds. Published by AIP Publishing.
机译:在这项工作中,提出了一个模型,用于解释原子锂簇在其最高自旋多重性方面的异常稳定性,并用于描述高自旋Li-10和Li-8簇的铁磁键合。该模型将海森堡哈密顿量的(缺乏)适应性与簇中价电子的(去)局部化程度相关联。结果表明,具有四个耦合常数的常规海森堡哈密顿量不能完全解释不同自旋态的能量。但是,一个更简单的模型(其中电子不位于原子核的位置而是位于电子本地化函数的吸引子的位置)成功地解释了能谱,同时解释了谢克发现的铁磁键使用价键理论的论点。这样,两种不同的观点,一种在物理学中经常使用的海森堡模型,另一种在化学中使用价键,就得出了相同的答案来解释那些非典型的键。由AIP Publishing发布。

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