Edge Channel Interference Controlled by Landau Level Filling

Details Edge Channel Interference Controlled by Landau Level Filling Edge Channel Interference Controlled by Landau Level Filling

2008-02-08

arxiv.org/abs/0802.1164v3

Phys. Rev. B v.78, p.075303, (2008).

Physics

Condensed Matter

Materials Science

5 pages, 5 figures, final version accepted for publication in Phys. Rev. B

Scientific paper

10.1103/PhysRevB.78.075303

We study the visibility of Aharonov-Bohm interference in an electronic Mach-Zehnder interferometer (MZI) in the integer quantum Hall regime. The visibility is controlled by the filling factor $\nu$ and is observed only between $\nu \approx 2.0$ and 1.0, with an unexpected maximum near $\nu=1.5$. Three energy scales extracted from the temperature and voltage dependences of the visibility change in a very similar way with the filling factor, indicating that the different aspects of the interference depend sensitively on the local structure of the compressible and incompressible strips forming the quantum Hall edge channels.

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