Fano resonance in electronic transport through a quantum wire with a side-coupled quantum dot: X-boson treatment

Article

关键词: PERIODIC ANDERSON MODEL;    NUMERICAL-RENORMALIZATION-GROUP;    LOW-TEMPERATURE TRANSPORT;    CUMULANT EXPANSION;    KONDO RESONANCE;    PERSISTENT CURRENTS;    MESOSCOPIC RING;    FINITE-U;    APPROXIMATION;    IMPURITY;   

DOI  :  10.1103/PhysRevB.67.155301

来源: SCIE

【 摘 要 】

The transport through a quantum wire with a side-coupled quantum dot is studied. We use the X-boson treatment for the Anderson single impurity model in the limit of U = infinity. The conductance presents a minimum for values of T = 0 in the crossover from mixed valence to Kondo regime due to a destructive interference between the ballistic channel associated with the quantum wire and the quantum dot channel. We obtain the experimentally studied Fano behavior of the resonance. The conductance as a function of temperature exhibits a logarithmic and universal behavior, that agrees with recent experimental results.

【 授权许可】

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