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The Enhanced Sensitivity of the Transmission Phase of a Quantum Dot to Kondo Correlations | | P.G.Silvestrov
; Y.Imry
; | | Date: |
17 Dec 2001 | | Journal: | Phys. Rev. Lett. 90, 106602 (2003) | | Subject: | Mesoscopic Systems and Quantum Hall Effect | cond-mat.mes-hall | | Abstract: | The strong sensitivity of the transmission phase through a quantum dot embedded into one arm of a two-wave Aharonov-Bohm interferometer to the Kondo effect is explained. The enhancement takes place because of the buildup of the exchange scattering on the dot due to Kondo correlations even much above $T_{K}$. The enhanced exchange competes with the potential scattering, which is always weak. Both cases of the Anderson impurity model and a multilevel quantum dot are considered. In the latter case in addition to the description of peculiar phase behavior a mechanism leading to ferromagnetic Kondo coupling in quantum dots is proposed. | | Source: | arXiv, cond-mat/0112308 | | Services: | Forum | Review | PDF | Favorites | |
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