Superposition of photon- and phonon- assisted tunneling in coupled quantum dots

Preprint

11 July 2001

preprint
Published by arXiv in arXiv

https://doi.org/10.48550/arXiv.cond-mat/0011155

Abstract

We report on electron transport through an artificial molecule formed by two tunnel coupled quantum dots, which are laterally confined in a two-dimensional electron system of an Al$_x$Ga$_{1-x}$As/GaAs heterostructure. Coherent molecular states in the coupled dots are probed by photon-assisted tunneling (PAT). Above 10 GHz, we observe clear PAT as a result of the resonance between the microwave photons and the molecular states. Below 8 GHz, a pronounced superposition of phonon- and photon-assisted tunneling is observed. Coherent superposition of molecular states persists under excitation of acoustic phonons.

Keywords

All Related Versions

Version 1, 2000-11-09, ArXiv
Version 2, 2001-07-11, ArXiv
Published version: Physical Review B, 64 (24), 241302.

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