On the equivalence between magnetic-field-induced phase transitions in the integer quantum Hall effect

C. F. Huang*, Y. H. Chang, H. H. Cheng, Zu-Po Yang, S. Y. Wang, H. D. Yeh, H. T. Chou, C. P. Lee, G. J. Hwang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

Magnetic-field-induced phase transitions in the two-dimensional electron system in a AlGaAs/InGaAs/GaAs heterostructure are studied. Two kinds of magnetic-field-induced phase transitions, plateau-plateau (P-P) and insulator-quantum Hall conductor (I-QH) transitions, are observed in the integer quantum Hall effect regime at high magnetic fields. In the P-P transition, both the semicircle law and the universality of critical conductivities are broken and we do not observe the universal scaling. However, the P-P transition can still be mapped to the I-QH transition by the Landau-level addition transformation, and as the temperature decreases the critical points of these two transitions appear at the same temperature. Our observations indicate that the equivalence between P-P and I-QH transitions can be found by the suitable analysis even when some expected universal properties are invalid.

Original languageEnglish
Pages (from-to)197-201
Number of pages5
JournalSolid State Communications
Volume126
Issue number4
DOIs
StatePublished - 1 Apr 2003

Keywords

  • D. Phase transitions
  • D. Quantum Hall effect
  • D. Scaling

Fingerprint Dive into the research topics of 'On the equivalence between magnetic-field-induced phase transitions in the integer quantum Hall effect'. Together they form a unique fingerprint.

Cite this