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Zero-bias anomalies and boson-assisted tunneling through quantum dots

Jürgen König·Herbert Schoeller·Gerd Schön
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Abstract

We study resonant tunneling through a quantum dot with one degenerate level in the presence of a strong Coulomb repulsion and a bosonic environment. Using a real-time approach we calculate the spectral density and the nonlinear current within a conserving approximation. The spectral density shows a multiplet of Kondo peaks split by the transport voltage and boson frequencies. As a consequence we find a zero-bias anomaly in the differential conductance which can show a local maximum or minimum depending on the level position. The results are compared with recent experiments.

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Jürgen König, Herbert Schoeller, Gerd Schön. 1995-06-19. Zero-bias anomalies and boson-assisted tunneling through quantum dots. https://doi.org/10.1103/physrevlett.76.1715

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