Stokes' Drift of linear Defects

Details Stokes' Drift of linear Defects Stokes' Drift of linear Defects

2002-03-06

arxiv.org/abs/cond-mat/0203131v1

Physics

Condensed Matter

Statistical Mechanics

14 pages, no figures, to be published in Phys.Rev.B

Scientific paper

10.1103/PhysRevB.65.184101

A linear defect, viz. an elastic string, diffusing on a planar substrate traversed by a travelling wave experiences a drag known as Stokes' drift. In the limit of an infinitely long string, such a mechanism is shown to be characterized by a sharp threshold that depends on the wave parameters, the string damping constant and the substrate temperature. Moreover, the onset of the Stokes' drift is signaled by an excess diffusion of the string center of mass, while the dispersion of the drifting string around its center of mass may grow anomalous.

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