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 $\nu \gg 1$. A hydrodynamic model for low-energy excitations of the liquid is developed. It is found that even at $\nu \gg 1$ the density of states exhibits a gap at low energies. Its width $2E_0$ depends on the strength of interaction only logarithmically, $2E_0=(\hslash {\omega }_c/\nu )\ln (\nu e^2/\epsilon \hslash v_F)$. The effects of temperature and disorder on the density of states are discussed.

8 pages, preprint TPI-MINN-94/28-T

References in corpus (3)

• Novel Edge Excitations of Two-dimensional Electron Liquid in a Magnetic Field
• Tunneling into a two-dimensional electron system in a strong magnetic field
• Instantons and the spectral function of electrons in the half-filled Landau level

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