Reentrant insulating phases in the integer quantum Hall regime

Talbot Knighton, Zhe Wu, Vinicio Tarquini, Jian Huang, L. N. Pfeiffer, K. W. West

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

Quantum Hall measurements are performed in a dilute high-quality GaAs two-dimensional hole system with carrier densities of (4.4-5.3)×1010cm-2. With the rs value approximately 20, the interaction effect is already strong even in the absence of magnetic field. In the integer quantum Hall regime up to 2 T, a series of reentrant insulating phases (RIPs) are observed between fillings 1, 2, 3, and 4, with peak locations periodic in 1/B. Moreover, the RIP peaks are also characterized by a striking inductance in response to ac excitations, which is likely due to the onset of a Wigner crystal state. The multiple RIP peaks indicate a more complex phase diagram than previously perceived.

Original languageEnglish (US)
Article number165117
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume90
Issue number16
DOIs
StatePublished - Oct 14 2014
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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