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arXiv 1802.00837cond-mat.mes-hallcond-mat.othercond-mat.stat-mech
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散粒噪声作为单原子自旋相关输运的探针

Shot noise as a probe of spin-correlated transport through single atoms

S. Pradhan, J. Fransson

摘要:

我们解决了散粒噪声的隧道电流通过一个本地化的自旋,有关最近的实验磁性吸附原子和单分子磁体。我们发现,非相关和自旋相关的散射过程都对噪声谱有重要贡献。自旋相关的散射过程提供了一个额外的贡献的Landauer-Büttiker散粒噪声表达式,占隧道电子和本地化的自旋力矩之间的相关性。通过计算的Fano因子,我们表明,超和亚泊松散粒噪声可以在我们的方法来描述。我们的理论提供了透明的见解噪声光谱,与最近的实验使用本地探测技术的磁性原子。

英文摘要:

We address the shot noise in the tunneling current through a localized spin, pertaining to recent experiments on magnetic adatoms and single molecular magnets. We show that both uncorrelated and spin-correlated scattering processes contribute vitally to the noise spectrum. The spin-correlated scattering processes provide an additional contribution to the Landauer-Büttiker shot noise expression, accounting for correlations between the tunneling electrons and the localized spin moment. By calculating the Fano factor, we show that both super- and sub-Poissonian shot noise can be described within our approach. Our theory provides transparent insights to noise spectroscopy, consistent with recent experiments using local probing techniques on magnetic atoms.

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