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arXiv · 0804.0689

Transverse rectification in density-modulated two-dimensional electron gases

A. Ganczarczyk·S. Rojek·A. Quindeau·M. Geller·A. Hucht·C. Notthoff·D. Reuter·A. D. Wieck·J. König·A. Lorke
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Abstract

We demonstrate tunable transverse 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 stripe of 2DEG. A transverse voltage in the direction of the density modulation is observed, i.e. perpendicular to the applied source-drain voltage. The polarity of the transverse voltage is independent of the polarity of the source-drain voltage, demonstrating rectification in the device. We find that the transverse voltage $U_{y}$ depends quadratically on the applied source-drain voltage and non-monotonically on the density modulation. The experimental results are discussed in the framework of a diffusion thermopower model.

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A. Ganczarczyk, S. Rojek, A. Quindeau, M. Geller, A. Hucht, C. Notthoff, D. Reuter, A. D. Wieck, J. König, A. Lorke. 2008-04-04. Transverse rectification in density-modulated two-dimensional electron gases. https://doi.org/10.1103/physrevb.86.085309

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