Dynamical Localization and Absolute Negative Conductance in an ac driven double quantum well

Details Dynamical Localization and Absolute Negative Conductance in an ac driven double quantum well Dynamical Localization and Absolute Negative Conductance in an ac driven double quantum well

1996-05-27

arxiv.org/abs/cond-mat/9605165v1

Physics

Condensed Matter

7 pages,Figures available upon request,submmited to Phys.Rev.Lett

Scientific paper

10.1103/PhysRevB.55.12860

We analyze the I-V characteristic of a double quantum well integrated in an antenna and driven by THz radiation.We propose a microscopic model to calculate the sequential current including selfconsistently the Coulomb interaction in a mean field approximation.Additional features in the current appear which depend not only on the frequency and intensity of the ac field but also on the charge in the wells.We observe,for some intensities and frequencies of the ac field,dynamical localization, i.e., quenching of the transmission,and, in the linear response regime, absolute negative conductance.We compare our calculations with recent experiments in driven double wells.

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