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

Abstract

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.

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

References in corpus (3)

• Time-dependent resonant tunneling via two discrete states
• Resonant Photon-Assisted Tunneling Through a Double Quantum Dot: An Electron Pump From Spatial Rabi Oscillations
• Coherent resonant tunneling in ac fields

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