Quantum Hall liquid-insulator and plateau-to-plateau transitions in a high mobility 2DEG in a HgTe quantum well

The present work reports the results of a study of the magnetic field induced Quantum Hall liquid-insulator transition and the plateau-to-plateau transition in a high mobility two-dimensional electron gas in a HgTe quantum well. The applicability of the universal scaling models (such as the universal critical exponent description and the semicircle model) for the description of these transitions is analyzed. We come to the conclusion that neither of these descriptions is completely adequate for the system under study.