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arXiv 0708.0906cond-mat.mes-hallcond-mat.str-el
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近藤量子点有限尺寸效应的光谱分析

Spectroscopic analysis of finite size effects around a Kondo quantum dot

Pascal Simon, Denis Feinberg

摘要:

我们考虑一个简单的设置,其中一个小的量子点是强连接到一个有限大小的盒子。这个盒子可以是一个金属盒子,也可以是一个有限尺寸的量子线,盒子中近藤屏蔽云的形成强烈地依赖于近藤温度与盒子能级间距的比值。通过将两个金属储存器弱连接到量子点,可以进行详细的光谱分析。由于传输通道和屏蔽通道几乎是解耦的,这样的设置允许更容易地访问与近藤云的有限扩展相关联的有限尺寸效应的测量。

英文摘要:

We consider a simple setup in which a small quantum dot is strongly connected to a finite size box. This box can be either a metallic box or a finite size quantum wire.The formation of the Kondo screening cloud in the box strongly depends on the ratio between the Kondo temperature and the box level spacing. By weakly connecting two metallic reservoirs to the quantum dot, a detailed spectroscopic analysis can be performed. Since the transport channels and the screening channels are almost decoupled, such a setup allows an easier access to the measure of finite-size effects associated with the finite extension of the Kondo cloud.

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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