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arXiv 0901.4839cond-mat.mes-hallcond-mat.str-el
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单自旋非弹性隧穿谱理论

Theory of single spin inelastic tunneling spectroscopy

J. Fernandez-Rossier

摘要:

最近的工作表明,非弹性电子扫描隧道显微镜(STM)探测薄绝缘层中单个和少数磁性原子的基元自旋激发。在这里,我表明,这种新类型的光谱描述使用现象学自旋辅助隧穿哈密顿。在这种形式中,非弹性$dI/dV$线形与被探测磁性原子的自旋谱权重有关。这解释了实验中观察到的自旋选择规则。该理论与现有的STM实验,以及单一的Fe和Mn原子,以及线性链的几个Mn原子。在非弹性$dI/dV$和显着的奇-偶$N$效应的磁各向异性占的理论。

英文摘要:

Recent work shows that inelastic electron scanning tunneling microscope (STM) probes the elementary spin excitations of a single and a few magnetic atoms in a thin insulating layer. Here I show that this new type of spectroscopy is described using a phenomenological spin-assisted tunneling Hamiltonian. Within this formalism, the inelastic $dI/dV$ lineshape is related to the spin spectral weight of the probed magnetic atom. This accounts for the spin selection rules observed experimentally. The theory agrees well with existing STM experiments for single Fe and Mn atoms as well as linear chains a few Mn atoms. The magnetic anisotropy in the inelastic $dI/dV$ and the marked odd-even $N$ effects are accounted for by the theory.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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