Collective Modes and Electronic Spectral Function in Smooth Edges of Quantum Hall Systems

Details Collective Modes and Electronic Spectral Function in Smooth Edges of Quantum Hall Systems Collective Modes and Electronic Spectral Function in Smooth Edges of Quantum Hall Systems

1996-08-28

arxiv.org/abs/cond-mat/9608143v1

Phys. Rev. B 54, 14309 (1996)

Physics

Condensed Matter

REVTeX, 4 pages, 1 figure

Scientific paper

10.1103/PhysRevB.54.R14309

We present a microscopic theory of the collective modes of a ``smooth'' edge of a quantum Hall system, showing under what conditions these modes can be described as a set of independent bosons. We then calculate the electronic spectral function in an independent-boson model - a procedure that reduces to standard bosonization in the limit of ``sharp'' edge. The I-V tunneling characteristics deduced from this model exhibit, for low voltage, a power law behavior, with exponents that differ significantly from those of the sharp edge model.

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