Zero--Bias Anomaly in Finite Size Systems
arXiv:cond-mat/9602015 · doi:10.1103/PhysRevB.54.5428
Abstract
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.
25 pages and 6 figures