Kondo Screening Cloud and the Charge Staircase in One-Dimensional Mesoscopic Devices

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Kondo Screening Cloud and the Charge Staircase in One-Dimensional Mesoscopic Devices

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Title: Kondo Screening Cloud and the Charge Staircase in One-Dimensional Mesoscopic Devices
Author: Halperin, Bertrand; Affleck, Ian; Laflorencie, Nicolas; Pereira, Rodrigo G.

Note: Order does not necessarily reflect citation order of authors.

Citation: Pereira, Rodrigo G., Nicolas Laflorencie, Ian Affleck, and Bertrand I. Halperin. 2008. Kondo screening cloud and the charge staircase in one-dimensional mesoscopic devices. Physical Review B 77, no. 12: 125327.
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Abstract: We propose that the finite size of the Kondo screening cloud, ξK , can be probed by measuring the charge quantization in a one-dimensional system coupled to a small quantum dot. When the chemical potential μ in the system is varied at zero temperature, one should observe charge steps whose locations are at values of μ that are controlled by the Kondo effect when the system size L is comparable to ξK . We show that, if the standard Kondo model is used, the ratio between the widths of the Coulomb blockade valleys with odd or even number of electrons is a universal scaling function of ξK/L . If we take into account electron-electron interactions in a single-channel wire, this ratio also depends on the parameters of the effective Luttinger model; in addition, the scaling is weakly violated by a marginal bulk interaction. For the geometry of a quantum dot embedded in a ring, we show that the dependence of the charge steps on a magnetic flux through the ring is controlled by the size of the Kondo screening cloud.
Published Version: http://dx.doi.org/10.1103/PhysRevB.77.125327
Other Sources: http://arxiv.org/abs/0801.4166v1
Terms of Use: This article is made available under the terms and conditions applicable to Open Access Policy Articles, as set forth at http://nrs.harvard.edu/urn-3:HUL.InstRepos:dash.current.terms-of-use#OAP
Citable link to this page: http://nrs.harvard.edu/urn-3:HUL.InstRepos:3110940

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  • FAS Scholarly Articles [6929]
    Peer reviewed scholarly articles from the Faculty of Arts and Sciences of Harvard University
 
 

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