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Spin-Dependent Transport Through An Interacting Quantum Dot | Ping Zhang
; Qi-Kun Xue
; Yu-Peng Wang
; X.C. Xie
; | Date: |
10 Oct 2002 | Subject: | Mesoscopic Systems and Quantum Hall Effect; Strongly Correlated Electrons | cond-mat.mes-hall cond-mat.str-el | Abstract: | We study the nonequilibrium spin transport through a quantum dot containing two spin levels coupled to the magnetic electrodes. A formula for the spin-dependent current is obtained and is applied to discuss the linear conductance and magnetoresistance in the interacting regime, where the so-called Kondo effect arises. We show that the Kondo resonance and the correlation-induced spin splitting of the dot levels may be systematically controlled by internal magnetization in the electrodes. As a result, when the electrodes are in parallel magnetic configuration, the linear conductance is characterized by two spin-resolved peaks. Furthermore, the presence of the spin-flip process in the dot splits the Kondo resonance into three peaks. | Source: | arXiv, cond-mat/0210241 | Services: | Forum | Review | PDF | Favorites |
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