Phonon-assisted tunneling between singlet states in two-electron quantum dot molecules

A. Grodecka, P. Machnikowski, J. Förstner, Physical Review B 78 (2008).

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Abstract
We study phonon-assisted electron tunneling in semiconductor quantum dot molecules. In particular, singletsinglet relaxation in a two-electron-doped structure is considered. The influence of Coulomb interaction is discussed via comparison with a single-electron system. We find that the relaxation rate reaches similar values in the two cases but the Coulomb interaction shifts the maximum rates toward larger separations between the dots. The difference in electron-phonon interaction between deformation potential and piezoelectric coupling is investigated. We show that the phonon-induced tunneling between two-electron singlet states is a fast process, taking place on the time scales of the order of a few tens of picoseconds.
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Journal Title
Physical Review B
Volume
78
Issue
8
Article Number
085302
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Grodecka A, Machnikowski P, Förstner J. Phonon-assisted tunneling between singlet states in two-electron quantum dot molecules. Physical Review B. 2008;78(8). doi:10.1103/physrevb.78.085302
Grodecka, A., Machnikowski, P., & Förstner, J. (2008). Phonon-assisted tunneling between singlet states in two-electron quantum dot molecules. Physical Review B, 78(8). https://doi.org/10.1103/physrevb.78.085302
@article{Grodecka_Machnikowski_Förstner_2008, title={Phonon-assisted tunneling between singlet states in two-electron quantum dot molecules}, volume={78}, DOI={10.1103/physrevb.78.085302}, number={8085302}, journal={Physical Review B}, publisher={American Physical Society (APS)}, author={Grodecka, A. and Machnikowski, P. and Förstner, Jens}, year={2008} }
Grodecka, A., P. Machnikowski, and Jens Förstner. “Phonon-Assisted Tunneling between Singlet States in Two-Electron Quantum Dot Molecules.” Physical Review B 78, no. 8 (2008). https://doi.org/10.1103/physrevb.78.085302.
A. Grodecka, P. Machnikowski, and J. Förstner, “Phonon-assisted tunneling between singlet states in two-electron quantum dot molecules,” Physical Review B, vol. 78, no. 8, 2008.
Grodecka, A., et al. “Phonon-Assisted Tunneling between Singlet States in Two-Electron Quantum Dot Molecules.” Physical Review B, vol. 78, no. 8, 085302, American Physical Society (APS), 2008, doi:10.1103/physrevb.78.085302.
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