Two-flux composite fermion series of the fractional quantum hall states in strained Si

K. Lai, W. Pan, D. C. Tsui, S. Lyon, M. Mühlberger, F. Schäffler

Research output: Contribution to journalArticle

57 Scopus citations

Abstract

Various magnetotransport properties in a high-mobility two-dimensional electron system in strained Si quantum well, were analyzed. The two-flux composite fermion (CF) series of the fractional quantum Hall effect (FQHE), was observed around ν=1/2 at ν=2/3, 3/5, 4/7, and at ν=4/9, 2/5, 1/3. It was observed that of the CF series, the 3/5 state is weaker than the nearby 4/7 state and the 3/7 state is conspicuously missing, which resembles the observation in the integer quantum Hall effect (IQHE) regime that the ν=3 is weaker than the nearby ν=4 state. The results show that at ν=3/5 and 3/7, the twofold valley degeneracy of the CF starts to be lifted and an estimated valley splitting of ∼1 K is obtained.

Original languageEnglish (US)
Pages (from-to)156805-1-156805-4
JournalPhysical review letters
Volume93
Issue number15
DOIs
StatePublished - Oct 8 2004

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Fingerprint Dive into the research topics of 'Two-flux composite fermion series of the fractional quantum hall states in strained Si'. Together they form a unique fingerprint.

  • Cite this