Kondo-assisted switching between three conduction states in capacitively coupled quantum dots

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Abstract

We propose a nanoscale device consisting of a double quantum dot with strong intra- A nd interdot Coulomb repulsions. In this design, the current can only flow through the lower dot, but is triggered by the gate-controlled occupancy of the upper dot. At low temperatures, our calculations predict the double dot to pass through a narrow Kondo regime, resulting in highly sensitive switching characteristics between three well-defined states-insulating, normal conduction, and resonant conduction.

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Lombardo, P., Hayn, R., Zhuravel, D., & Schäfer, S. (2020). Kondo-assisted switching between three conduction states in capacitively coupled quantum dots. Physical Review Research, 2(3). https://doi.org/10.1103/PhysRevResearch.2.033387

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