✦ LIBER ✦
Controlling directed transport in two-dimensional periodic structures under crossed electric fields
✍ Scribed by S. Sengupta; R. Guantes; S. Miret-Artés; P. Hänggi
- Publisher
- Elsevier Science
- Year
- 2004
- Tongue
- English
- Weight
- 372 KB
- Volume
- 338
- Category
- Article
- ISSN
- 0378-4371
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✦ Synopsis
We investigate di erent mechanisms for the control of directed transport of particles on twodimensional periodic and symmetric substrates, based on the application of a crossed static and a bi-harmonic (harmonic mixing) ÿeld. We focus on inertial systems in the low friction regime, using a prototypical model for atom-surface di usion, and demonstrate that a proper control of current reversals can be achieved at moderate ÿeld strengths by tuning either the static ÿeld or changing the relative phase of the harmonic mixing signal, respectively.