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Magnetism of Nanowires Driven by Novel Even-Odd Effects

机译:新型奇偶效应驱动的纳米线的磁性

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The parity of the number of atoms in finite antifcrromagnetic nanowires deposited on ferromagnets is shown to be a crucial quantity determining their magnetic ground state. Relating results of the full-potential Korringa-Kohn-Rostoker method for noncollinear magnetism from first principles to a Heisenberg model, we show that the magnetic structure changes dramatically across the entire nanowire if one single atom is added to it. Infinite and finite even-numbered nanochains exhibit always noncollinear magnetism, while odd-numbered wires lead under given conditions to a collinear ferrimagnetic ground state. This extremely nonlocal effect occurs only for nanosized wires.
机译:结果表明,沉积在铁磁体上的有限反铁磁纳米线中原子数量的奇偶性是决定其磁性基态的关键量。将用于非共线磁性的全势Korringa-Kohn-Rostoker方法的结果从第一原理到海森堡模型的相关性,我们表明,如果将单个原子添加到整个纳米线上,其磁性结构会发生巨大变化。无限和有限的偶数纳米链始终显示非共线磁性,而奇数线在给定条件下导致共线亚铁磁性基态。这种极其非局部的影响仅发生在纳米尺寸的导线上。

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