Volume 66, Number 1, April 2004
|Page(s)||104 - 110|
|Section||Condensed matter: electronic structure, electrical, magnetic, and optical properties|
|Published online||01 March 2004|
Fluctuating Hall resistance defeats the quantized Hall insulator
Institut für Physik, Technische Universität Chemnitz - 09107 Chemnitz, Germany
2 Department of Physics and Centre for Scientific Computing, University of Warwick Coventry CV4 7AL, UK
Accepted: 30 January 2004
Using the Chalker-Coddington network model as a drastically simplified, but universal model of integer quantum Hall physics, we investigate the plateau-to-insulator transition at strong magnetic field by means of a real-space renormalization approach. Our results suggest that for a fully quantum coherent situation, the quantized Hall insulator with is observed up to when studying the most probable value of the distribution function . Upon further increasing , the Hall insulator with diverging Hall resistance is seen. The crossover between these two regimes depends on the precise nature of the averaging procedure.
PACS: 73.43.-f – Quantum Hall effects / 73.43.Nq – Quantum phase transitions / 64.60.Ak – Renormalization-group, fractal, and percolation studies of phase transitions
© EDP Sciences, 2004
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