6. Chalker-Coddington model for the Quantum Hall effect
Presentations » 6. Chalker-Coddington model for the Quantum Hall effect
Taken by Krzysztof Biedron
The Quantum Hall effect manifests itself by peaks (in the longitudinal direction) and plateaus (in the transverse direction) of the conductance of a 2d electron gas exposed to a perpendicular magnetic field. The Chalker-Coddingtion model is a simple model describing the transition between plateaus of the Quantum Hall effect. The attached papers discuss the properties of this model and a controversy on its critical exponent.
The first paper is a general review (which will be presented in presentation 5), where the model is introduced in section 3. The state of the art is discussed in the Phys. Rev. B paper and in the oral presentation attached.