Universal Linear Density of States for Tunneling into the Two-Dimensional Electron Gas in a Magnetic field

Abstract

A new technique permits high fidelity measurement of the tunneling density of states (TDOS) of the two-dimensional electron gas. The obtained TDOS contains no distortions arising from low 2D in-plane conductivity and includes the contribution from localized tunneling sites. In a perpendicular magnetic field, a pseudogap develops in the TDOS at the Fermi level. Improved sensitivity enables resolution of a linear dependence of the TDOS on energy near the Fermi energy. The slopes of this linear gap are strongly field dependent. The data are suggestive of a new model of the gap at low energies.

5 pages, 4 postscript figures, LateX, submitted to PRL

References in corpus (4)

• Charge Density Wave in Two-Dimensional Electron Liquid in Weak Magnetic Field
• Tunneling into a two-dimensional electron system in a strong magnetic field
• Tunneling Between Two-Dimensional Electron Gases in a Strong Magnetic Field
• Tunneling into a Two-Dimensional Electron Liquid in a Weak Magnetic Field

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