Absolute transverse mobility and ratchet effect on periodic two-dimensional symmetric substrates.
We present a simple model of an overdamped particle moving on a two-dimensional symmetric periodic substrate with a dc drive in the longitudinal direction and additional ac drives in both the longitudinal and transverse directions. For certain regimes we find that a finite longitudinal dc force produces a net dc response only in the transverse direction, which we term absolute transverse mobility. Additionally, we find regimes exhibiting a ratchet effect in the absence of an applied dc drive.
Reichhardt
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Center for Nonlinear Studies and Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.
Olson Reichhardt
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