How to directly measure a Kondo cloud's length

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 temperat...

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Published in:Physical review letters 2013-06, Vol.110 (24), p.246603-246603, Article 246603
Main Authors: Park, Jinhong, Lee, S-S B, Oreg, Yuval, Sim, H-S
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Language:English
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creator Park, Jinhong
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Oreg, Yuval
Sim, H-S
description 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.
doi_str_mv 10.1103/physrevlett.110.246603
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title How to directly measure a Kondo cloud's length
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