Termination of the series of fractional quantum hall states at small filling factors

R. L. Willett, H. L. Stormer, D. C. Tsui, L. N. Pfeiffer, K. W. West, K. W. Baldwin

Research output: Contribution to journalArticlepeer-review

174 Scopus citations

Abstract

We report magnetotransport measurements on low-density, high-mobility two-dimensional (2D) electron systems in (Al,Ga)As/GaAs heterostructures down to Landau-level filling factors of v118. We observe a striking activated temperature dependence with onset near 15 and continuing to smallest v. The activation energy increase is approximately linear with decreasing v and its slope depends monotonically on 2D density. While magnetic-field-induced localization cannot be ruled out, several features of the results are consistent with the formation of a pinned 2D Wigner crystal.

Original languageEnglish (US)
Pages (from-to)7881-7884
Number of pages4
JournalPhysical Review B
Volume38
Issue number11
DOIs
StatePublished - 1988
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

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