Tunneling into a Two-Dimensional Electron Liquid in a Weak Magnetic Field
Abstract
We study the spectral density function of a two-dimensional electron liquid in a weak magnetic field, the filling factor 1. A hydrodynamic model for low-energy excitations of the liquid is developed. It is found that even at 1 the density of states exhibits a gap at low energies. Its width 2E0 depends on the strength of interaction only logarithmically, 2E0=(ωc/) ( e2/ vF). The effects of temperature and disorder on the density of states are discussed.
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