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首页> 外文期刊>Physical review >Effect Of Exchange Interaction On The Spin-polarized Bound States On Metal Surfaces:rnab Initio Study
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Effect Of Exchange Interaction On The Spin-polarized Bound States On Metal Surfaces:rnab Initio Study

机译：交换相互作用对金属表面自旋极化态的影响：rnab从头算

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摘要

The exchange interaction between magnetic adatoms on a metal surface is known to significantly influence the magnetic characteristics of the system. In present study we analyze the effect of the exchange interaction on the spin-dependent localization of the surface state. Our ab initio study of spin-polarized bound states arising at pairs of magnetic adatoms shows that both the position and the shape of the bound-state peak are strongly affected by the spin coupling in the system. Moreover we demonstrate that the spin splitting of the bound-state peak can serve as a suitable tool for probing the exchange coupling in the system. By the example of Co pairs on a Cu(111) surface at different interatomic separations, we demonstrate that the presence of the spin splitting of the bound-state peak is a signature of a ferromagnetic coupling while its absence signifies an antiferromagnetic configuration of the system spins. Also, the amount of splitting can be regarded as a measure of the interaction's strength.
机译：已知金属表面上的磁性吸附原子之间的交换相互作用会显着影响系统的磁性。在本研究中，我们分析了交换相互作用对表面状态的自旋依赖性局部的影响。我们从头对磁性原子对产生的自旋极化结合态的研究表明，结合态峰的位置和形状都受到系统中自旋耦合的强烈影响。此外，我们证明了束缚态峰的自旋分裂可以用作探测系统中交换耦合的合适工具。通过在不同原子间间距处Cu（111）表面上Co对的示例，我们证明了束缚态峰的自旋分裂的存在是铁磁耦合的特征，而其不存在则表明系统的反铁磁结构旋转。同样，拆分的数量也可以视为交互强度的度量。

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