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arXiv 1102.3788cond-mat.mes-hall
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原子自旋激发光谱的非弹性贡献分析

Analysis of the inelastic contribution to atomic spin excitation spectroscopy

Bruno Chilian, Alexander A. Khajetoorians, Jens Wiebe, Roland Wiesendanger

摘要:

我们调查的非弹性自旋激发贡献的扫描隧道光谱记录以上Fe吸附在InSb(110)表面在亚开尔文温度下,体掺杂和隧道结电阻的依赖关系。为了解释我们的观察结果,我们展示了非弹性贡献如何依赖于描述激发机制和隧道条件的参数,在最近开发的模型的框架。我们的结论是,在这个特定的系统中的吸附物,这是强烈放松到基板,尖端样品的距离依赖的隧道必须考虑到,以解释所观察到的非弹性隧道光谱的变化。

英文摘要:

We investigate the dependence of the inelastic spin excitation contribution to scanning tunneling spectroscopy recorded above Fe adsorbates on the InSb(110) surface at subkelvin temperatures, on bulk doping and tunnel junction resistance. To explain our observations, we show how the inelastic contribution depends on the parameters describing the excitation mechanism and tunnel conditions, in the framework of a recently developed model. We conclude that in this particular system of an adsorbate which is strongly relaxed into the substrate, the tip-sample distance dependent by-tunneling has to be taken into account in order to explain the observed variations in the inelastic tunnel spectra.

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