Measurement of High Density Electrons Above a Helium Film on an Amorphous Metal Substrate

Abstract

We have measured two-dimensional electron systems bound to a thin helium film supported by a metallic substrate. We report on our measurement of electron density obtained via a Kelvin probe technique. The underlying metallic substrate is an amorphous metallic alloy (TaWSi), which can support large uniform densities due to its low surface roughness and homogeneous work function. We find that this substrate is able to support high enough densities that the electrons are expected to be Fermi-degenerate.

arXiv comment13 Pages, 4 Figures

References in corpus (5)

• Zero Temperature Phases of the Electron Gas
• Transport in strongly correlated two dimensional electron fluids
• Composite Fermions Waltz to the Tune of a Wigner Crystal
• Analyzing the equilibrium states of quasi-neutral spatially inhomogeneous system of charges above liquid dielectric film basing on first principles of quantum statistics
• Transport Measurements of Surface Electrons in 200 nm Deep Helium-Filled Microchannels Above Amorphous Metallic Electrodes