Interplay between fractional quantum Hall liquid and crystal phases at low filling

Zheng Wei Zuo, Ajit C. Balram, Songyang Pu, Jianyun Zhao, Thierry Jolicoeur, A. Wójs, J. K. Jain

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

The nature of the state at low Landau-level filling factors has been a long-standing puzzle in the field of the fractional quantum Hall effect (FQHE). While theoretical calculations suggest that a crystal is favored at filling factors νâ‰16, experiments show, at somewhat elevated temperatures, minima in the longitudinal resistance that are associated with fractional quantum Hall effect at ν=17, 211, 213, 317, 319, 19, 215, and 217, which belong to the standard sequences ν=n/(6n±1) and n/(8n±1). To address this paradox, we investigate the nature of some of the low-ν states, specifically ν=17, 213, and 19, by variational Monte Carlo, density matrix renormalization group, and exact diagonalization methods. We conclude that in the thermodynamic limit, these are likely to be incompressible fractional quantum Hall liquids, albeit with strong short-range crystalline correlations. This suggests a natural explanation for the experimentally observed behavior and a rich phase diagram that admits, in the low-disorder limit, a multitude of crystal-FQHE liquid transitions as the filling factor is reduced.

Original languageEnglish (US)
Article number075307
JournalPhysical Review B
Volume102
Issue number7
DOIs
StatePublished - Aug 15 2020

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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