PMID: 15245302Jul 13, 2004Paper

Climbing the entropy barrier: driving the single- towards the multichannel Kondo effect by a weak coulomb blockade of the leads

Physical Review Letters
S Florens, A Rosch

Abstract

We study a model proposed recently in which a small quantum dot is coupled symmetrically to several large quantum dots characterized by a charging energy E(c). Even if E(c) is much smaller than the Kondo temperature T(K), the long-ranged interactions destabilize the single-channel Kondo effect and induce a flow towards a multichannel Kondo fixed point associated with a rise of the impurity entropy with decreasing temperature. Such an "uphill flow" implies a negative impurity specific heat, in contrast with all systems with local interactions. An exact solution found for a large number of channels allows us to capture this physics and to predict transport properties.

References

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Citations

Mar 9, 2007·Nature·R M PotokD Goldhaber-Gordon
Aug 8, 2009·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·Gert-Ludwig IngoldPeter Talkner
Nov 13, 2009·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·Gert-Ludwig IngoldSerge Reynaud
May 16, 2017·Physical Review. B·Rok Žitko, Michele Fabrizio
Nov 14, 2015·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·Stefan UmrathPaulo A Maia Neto
Aug 11, 2005·Physical Review Letters·C J Bolech, N Shah

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