Edge channel mixing induced by potential steps in an integer quantum Hall system

Details Edge channel mixing induced by potential steps in an integer quantum Hall system Edge channel mixing induced by potential steps in an integer quantum Hall system

2010-08-11

arxiv.org/abs/1008.1913v2

Phys. Rev. B 83, 075315 (2011)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

final version: 7 pages, 6 figures

Scientific paper

10.1103/PhysRevB.83.075315

We investigate the coherent mixing of co-propagating edge channels in a quantum Hall bar produced by step potentials. In the case of two edge channels it is found that, although a single step induces only a few percent mixing, a series of steps could yield 50% mixing. In addition, a strong mixing is found when the potential height of a single step allows a different number of edge channels on the two sides of the step. Charge density probability has been also calculated even for the case where the step is smoothened.

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