Zero--Bias Anomaly in Finite Size Systems

Details Zero--Bias Anomaly in Finite Size Systems Zero--Bias Anomaly in Finite Size Systems

1996-02-04

arxiv.org/abs/cond-mat/9602015v1

Physics

Condensed Matter

25 pages and 6 figures

Scientific paper

10.1103/PhysRevB.54.5428

The small energy anomaly in the single particle density of states of disordered interacting systems is studied for the zero dimensional case. This anomaly interpolates between the non--perturbative Coulomb blockade and the perturbative limit, the latter being an extension of the Altshuler--Aronov zero bias anomaly at d=0. Coupling of the zero dimensional system to a dissipative environment leads to an effective screening of the interaction and a modification of the density of states.

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