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

doi:10.1142/S0217979204026950

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 journal › Article › peer-review

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 language	English (US)
Pages (from-to)	3533-3535
Number of pages	3
Journal	International Journal of Modern Physics B
Volume	18
Issue number	27-29
DOIs	https://doi.org/10.1142/S0217979204026950
State	Published - 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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title = "The two-flux composite fermion series of fractional quantum Hall states in strained (100) Si",

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.",

keywords = "Composite fermion, Fractional quantum Hall effect, Strained Si",

author = "K. Lai and W. Pan and Tsui, {D. C.} and S. Lyon and M. Muhlberger and F. Schaffler",

note = "Funding Information: This research was supported by the DOE and the NSF. NHMFL is supported by NSF Cooperative Agreement No. DMR-0084173 and by the State of Florida. Sandia is a multiprogram laboratory operated by Sandia Corporation, a Lockheed Martin company, for the United States Department of Energy's National Nuclear Security Administration under contract DE-AC04-94AL85000. We thank E. Palm, T. Murphy, S. Hannahs, B. Brandt, and the Hybrid Magnet operation team for their assistances.",

year = "2004",

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doi = "10.1142/S0217979204026950",

language = "English (US)",

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TY - JOUR

T1 - The two-flux composite fermion series of fractional quantum Hall states in strained (100) Si

AU - Lai, K.

AU - Pan, W.

AU - Tsui, D. C.

AU - Lyon, S.

AU - Muhlberger, M.

AU - Schaffler, F.

N1 - Funding Information: This research was supported by the DOE and the NSF. NHMFL is supported by NSF Cooperative Agreement No. DMR-0084173 and by the State of Florida. Sandia is a multiprogram laboratory operated by Sandia Corporation, a Lockheed Martin company, for the United States Department of Energy's National Nuclear Security Administration under contract DE-AC04-94AL85000. We thank E. Palm, T. Murphy, S. Hannahs, B. Brandt, and the Hybrid Magnet operation team for their assistances.

PY - 2004/11/30

Y1 - 2004/11/30

N2 - 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.

AB - 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.

KW - Composite fermion

KW - Fractional quantum Hall effect

KW - Strained Si

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

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