Zero-bias Anomaly of Tunneling into the Edge of a 2D Electron System
L. Shekhtman, L. I. Glazman
Abstract
We investigate the electron tunneling into the edge of a clean weakly interacting two-dimensional electron gas. It is shown that the corresponding differential conductance G(V) has a cusp at zero bias, and is characterized by a universal slope |dG/dV| at V=0. This singularity originates from the electron scattering on the Friedel oscillation caused by the boundary of the system.
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