Low temperature transport in AC-driven Quantum Dots in the Kondo regime

Дата и время публикации : 2000-09-18T14:41:57Z

Авторы публикации и институты :
Rosa Lopez
Ramon Aguado
Gloria Platero
Carlos Tejedor

Ссылка на журнал-издание: Ссылка на журнал-издание не найдена
Коментарии к cтатье: 30 pages,7 figures
Первичная категория: cond-mat.str-el

Все категории : cond-mat.str-el

Краткий обзор статьи: We present a fully nonequilibrium calculation of the low temperature transport properties of a quantum dot in the Kondo regime when an AC potential is applied to the gate voltage. We solve a time dependent Anderson model with finite on-site Coulomb interaction. The interaction self-energy is calculated up to second order in perturbation theory in the on-site interaction, in the context of the Keldysh non-equilibrium technique, and the effect of the AC voltage is taken into account exactly for all ranges of AC frequencies and AC intensities. The obtained linear conductance and time-averaged density of states of the quantum dot evolve in a non trivial way as a function of the AC frequency and AC intensity of the harmonic modulation.

Category: Physics