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arXiv · 1703.10059

Fluctuation induced forces in the presence of mobile carrier drift

Boris Shapiro
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Abstract

A small polarizable object (an atom, molecule or nanoparticle), placed above a medium with flowing dc current in it, is considered. It is shown that the dc current can have a strong effect on the force exerted on the particle. The Casimir-Lifshitz force, well studied in the absence of current, gets modified due to drifting mobile carriers in the medium. Furthermore, a force in the lateral direction appears. This force is a non-monotonic function of the drift velocity and its maximal value is comparable with the Casimir-Lifshitz force. If the temperatures of the medium and the particle are different, this lateral force can be directed along the current (drag) or in the opposite direction (anti-drag).

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Boris Shapiro. 2017-03-29. Fluctuation induced forces in the presence of mobile carrier drift. https://doi.org/10.1103/physrevb.96.075407

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