Tunneling into a Two-Dimensional Electron Liquid in a Weak Magnetic Field

Details Tunneling into a Two-Dimensional Electron Liquid in a Weak Magnetic Field Tunneling into a Two-Dimensional Electron Liquid in a Weak Magnetic Field

1994-08-10

arxiv.org/abs/cond-mat/9408033v1

Physics

Condensed Matter

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

Scientific paper

10.1103/PhysRevLett.74.3435

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, $2E_0=(\hbar\omega_c/\nu)\ln (\nu e^2/\varepsilon\hbar v_F)$. The effects of temperature and disorder on the density of states are discussed.

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