Volume 63, Number 5, September 2003
|Page(s)||736 - 742|
|Section||Condensed matter: electronic structure, electrical, magnetic, and optical properties|
|Published online||01 November 2003|
Scaling approach to the phase diagram of quantum Hall systems
Département de Physique, Université de Fribourg Pérolles, CH-1700 Fribourg, Switzerland
2 Laboratoire de Physique des Solides, Université Paris-Sud - F-91405 Orsay, France
Accepted: 25 June 2003
We present a simple classification of the different liquid and solid phases of quantum Hall systems in the regime where the Coulomb interaction between electrons is significant, i.e. away from integral filling factors. This classification, and a criterion for the validity of the mean-field approximation in the charge-density-wave phase, is based on scaling arguments concerning the effective interaction potential of electrons restricted to an arbitrary Landau level. Finite-temperature effects are investigated within the same formalism, and a good agreement with recent experiments is obtained.
PACS: 73.43.-f – Quantum Hall effects / 73.43.Nq – Quantum phase transitions / 73.20.Qt – Electron solids
© EDP Sciences, 2003
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