A hydrodynamic model is used to study the magnetoplasma modes of a two-dimensional electron fluid confined to a half-plane. In addition to the usual bulk modes, an approximate theory predicts new localized edge modes that propagate along the boundary, with a frequency proportional to B^-1 in high magnetic fields. These modes provide a good fit to those seen in recent experiments of Mast and Dehm.
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Alexander L. Fetter (1985) studied this question.
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