1995/07/10 by Dror Orgad, Shimon Levit · 2 citations
Engineering · Physics and Astronomy · #Advancements in Semiconductor Devices and Circuit Design #Quantum and electron transport phenomena #Semiconductor Quantum Structures and Devices #cond-mat
paper · pdf · doi:10.1103/physrevb.53.7964
published as Phys. Rev. B 53, 7964 (1996) · 11 pages, REVTEX, 2 uuencoded postscript figures
arxiv created 1995/07/10 · openalex publication_date 1996/03/15 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Long-range Coulomb interaction between the edges of a Hall bar changes the nature of the gapless edge excitations. Instead of independent modes propagating in opposite directions on each edge as expected for a short-range interaction one finds elementary excitations living simultaneously on both edges, i.e., composed of correlated density waves propagating in the same direction on opposite edges. We discuss the microscopic features of this Coulomb drag of excitations in the fractional quantum Hall regime within the framework of the bosonic Chern-Simons Landau-Ginzburg theory. The dispersion law of these excitations is nonlinear and depends on the distance between the edges as well as on the current that flows through the sample. The latter dependence indicates a possibility of parametric excitation of these modes. The bulk distributions of the density and currents of the edge excitations differ significantly for short- and long-range interactions. \textcopyright 1996 The American Physical Society.