Physics on the edge: contour dynamics, waves and solitons in the quantum Hall effect

Details Physics on the edge: contour dynamics, waves and solitons in the quantum Hall effect Physics on the edge: contour dynamics, waves and solitons in the quantum Hall effect

1999-05-04

arxiv.org/abs/cond-mat/9905042v2

Phys. Rev. B 60, 10971 (1999)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

15 pages, 12 embedded figures, submitted to Phys. Rev. B

Scientific paper

10.1103/PhysRevB.60.10971

We present a theoretical study of the excitations on the edge of a two-dimensional electron system in a perpendicular magnetic field in terms of a contour dynamics formalism. In particular, we focus on edge excitations in the quantum Hall effect. Beyond the usual linear approximation, a non-linear analysis of the shape deformations of an incompressible droplet yields soliton solutions which correspond to shapes that propagate without distortion. A perturbative analysis is used and the results are compared to analogous systems, like vortex patches in ideal hydrodynamics. Under a local induction approximation we find that the contour dynamics is described by a non-linear partial differential equation for the curvature: the modified Korteweg-de Vries equation. PACS number(s): 73.40.Hm, 02.40.Ma, 03.40.Gc, 11.10.Lm

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