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arXiv · 1008.0963

Acoustic phonon-based interaction between coplanar quantum circuits in magnetic field

M. G. Prokudina·V. S. Khrapai·S. Ludwig·J. P. Kotthaus·H. P. Tranitz·W. Wegscheider
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Abstract

We explore the acoustic phonon-based interaction between two neighboring coplanar circuits containing semiconductor quantum point contacts in a perpendicular magnetic field B. In a drag-type experiment, a current flowing in one of the circuits (unbiased) is measured in response to an external current in the other. In moderate B the sign of the induced current is determined solely by the polarity of B. This indicates that the spatial regions where the phonon emission/reabsorption is efficient are controlled by magnetic field. The results are interpreted in terms of non-equilibrium transport via skipping orbits in two-dimensional electron system.

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M. G. Prokudina, V. S. Khrapai, S. Ludwig, J. P. Kotthaus, H. P. Tranitz, W. Wegscheider. 2010-11-17. Acoustic phonon-based interaction between coplanar quantum circuits in magnetic field. https://doi.org/10.1103/physrevb.82.201310

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