The two-flux composite fermion series of fractional quantum Hall states in strained (100) Si

K. Lai, W. Pan, D. C. Tsui, S. Lyon, M. Muhlberger, F. Schaffler

Research output: Contribution to journalArticle

3 Scopus citations

Abstract

Magnetotransport properties are studied in a high-mobility 2DES in the strained Si quantum well. We observe around ν = 1/2 the two-flux composite fermion (CF2) series of the FQHE states at ν = 2/3, 3/5, 4/7, and at ν = 4/9, 2/5, 1/3. Of the CF series, the ν = 3/5 state is weaker than the nearby 4/7 state and the 3/7 state is missing, resembling the observation that the ν = 3 is weaker than the ν = 4 state. Our data indicate that the CF model still applies for the multivalley Si/SiGe system when taking into account the two-fold valley degeneracy.

Original languageEnglish (US)
Pages (from-to)3533-3535
Number of pages3
JournalInternational Journal of Modern Physics B
Volume18
Issue number27-29
DOIs
StatePublished - Nov 30 2004

All Science Journal Classification (ASJC) codes

  • Statistical and Nonlinear Physics
  • Condensed Matter Physics

Keywords

  • Composite fermion
  • Fractional quantum Hall effect
  • Strained Si

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