Weak levitation of 2D delocalized states in a magnetic field.

Details Weak levitation of 2D delocalized states in a magnetic field. Weak levitation of 2D delocalized states in a magnetic field.

1995-02-15

arxiv.org/abs/cond-mat/9502059v1

Phys. Rev. Lett. 75, 304 (1995)

Physics

Condensed Matter

Latex file (12 pages) + 3 Postscript figures.

Scientific paper

10.1103/PhysRevLett.75.304

The deviation of the energy position of a delocalized state from the center of Landau level is studied in the framework of the Chalker-Coddington model. It is demonstrated that introducing a weak Landau level mixing results in a shift of the delocalized state up in energy. The mechanism of a levitation is a neighboring - Landau level - assisted resonant tunneling which ``shunts'' the saddle-points. The magnitude of levitation is shown to be independent of the Landau level number.

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