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arXiv · 1210.6138

How to directly measure a Kondo cloud's length

Jinhong Park·S. -S. B. Lee·Yuval Oreg·H. -S. Sim
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Abstract

We propose a method to directly measure, by electrical means, the Kondo screening cloud formed by an Anderson impurity coupled to semi-infinite quantum wires, on which an electrostatic gate voltage is applied at distance L from the impurity. We show that the Kondo cloud, and hence the Kondo temperature and the electron conductance through the impurity, are affected by the gate voltage, as L decreases below the Kondo cloud length. Based on this behavior, the cloud length can be experimentally identified by changing L with a keyboard type of gate voltage or tuning the coupling strength between the impurity and the wires.

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Jinhong Park, S. -S. B. Lee, Yuval Oreg, H. -S. Sim. 2012-10-23. How to directly measure a Kondo cloud's length. https://doi.org/10.1103/physrevlett.110.246603

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