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

Sergio Conti·Giovanni Vignale
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Abstract

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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Sergio Conti, Giovanni Vignale. 1996-08-28. Collective Modes and Electronic Spectral Function in Smooth Edges of Quantum Hall Systems. https://doi.org/10.1103/physrevb.54.r14309

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