Tunneling Density of States of the Interacting Two-Dimensional Electron Gas

Details Tunneling Density of States of the Interacting Two-Dimensional Electron Gas Tunneling Density of States of the Interacting Two-Dimensional Electron Gas

2003-04-25

arxiv.org/abs/cond-mat/0304592v2

Phys. Rev. Lett. 91, 166402 (2003)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 2 figures; slightly shortened version published in PRL

Scientific paper

10.1103/PhysRevLett.91.166402

We investigate the influence of electron--electron interactions on the density of states of a ballistic two--dimensional electron gas. The density of states is determined nonperturbatively by means of path integral techniques allowing for reliable results near the Fermi surface, where perturbation theory breaks down. We find that the density of states is suppressed at the Fermi level to a finite value. This suppression factor grows with decreasing electron density and is weakened by the presence of gates.

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