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Experimental investigation of the ratchet effect in a two-dimensional electron system with broken spatial inversion symmetry

S. Sassine·Yu. Krupko·J. -C. Portal·Z. D. Kvon·R. Murali·K. P. Martin·G. Hill·A. D. Wieck
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Abstract

We report on experimental evidence of directed electron transport, induced by external linear-polarized microwave irradiation, in a two-dimensional spatially-periodic asymmetrical system called ratchet. The broken spatial symmetry was introduced in a high mobility two-dimensional electron gas based on AlGaAs/GaAs heterojunction, by patterning an array of artificial semi-discs-shaped antidots. We show that the direction of the transport is efficiently changed by microwave polarization. The dependence of the effect on magnetic field and temperature is investigated. This represents a significant step towards the realization of new microwave detectors and current generators.

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S. Sassine, Yu. Krupko, J. -C. Portal, Z. D. Kvon, R. Murali, K. P. Martin, G. Hill, A. D. Wieck. 2008-02-28. Experimental investigation of the ratchet effect in a two-dimensional electron system with broken spatial inversion symmetry. https://doi.org/10.1103/physrevb.78.045431

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