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Tunneling resonances in quantum dots: Coulomb interaction modifies the width

J. Könemann·B. Kubala·J. König·R. J. Haug
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Abstract

Single-electron tunneling through a zero-dimensional state in an asymmetric double-barrier resonant-tunneling structure is studied. The broadening of steps in the $I$--$V$ characteristics is found to strongly depend on the polarity of the applied bias voltage. Based on a qualitative picture for the finite-life-time broadening of the quantum dot states and a quantitative comparison of the experimental data with a non-equilibrium transport theory, we identify this polarity dependence as a clear signature of Coulomb interaction.

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J. Könemann, B. Kubala, J. König, R. J. Haug. 2005-06-20. Tunneling resonances in quantum dots: Coulomb interaction modifies the width. https://doi.org/10.1103/physrevb.73.033313

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