Tunable ballistic rectification in a density-modulated two-dimensional-system

Details Tunable ballistic rectification in a density-modulated two-dimensional-system Tunable ballistic rectification in a density-modulated two-dimensional-system

2008-04-04

arxiv.org/abs/0804.0689v3

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Scientific paper

We demonstrate tunable rectification in a density-modulated two-dimensional electron gas (2DEG). The density modulation is induced by two surface gates, running in parallel along a narrow strip of 2DEG. A transverse voltage in the direction of the density-gradient is observed, i.e. perpendicular to the applied source-drain voltage. The transverse voltage depends on the sign and magnitude of the density gradient. The polarity of the transverse voltage is independent of the polarity of the source-drain voltage demonstrating rectification in the device. The experimental results are discussed in the framework of a classical, single particle billiard model.

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