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

Abstract

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.

arXiv comment4 pages, 2 figures; slightly shortened version published in PRL

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Cited by in corpus (6)

• Quasiclassical theory of electronic transport in mesoscopic systems: Luttinger liquids revisited
• Infrared catastrophe and tunneling into strongly correlated electron systems: Perturbative x-ray edge limit
• Density of states of the interacting two-dimensional electron gas
• Josephson $\pi$-state in superconductor-Luttinger liquid hybrid systems
• Infrared catastrophe and tunneling into strongly correlated electron systems: Exact solution of the x-ray edge limit for the 1D electron gas and 2D Hall fluid
• Impact of spin-orbit coupling on electron correlation corrections to the density of states in anisotropic conductors