The two-flux composite fermion series of fractional quantum Hall states in strained (100) Si.
Conference
·
OSTI ID:957225
- Princeton University, Princeton, NJ
- Universitat Linz, Linz, Austria
Magnetotransport properties are studied in a high-mobility 2DES in the strained Si quantum well. We observe around v = 1/2 the two-flux composite fermion (CF{sup 2}) series of the FQHE states at v = 2/3, 3/5, 4/7, and at v = 4/9, 2/5, 1/3. Of the CF series, the v = 3/5 state is weaker than the nearby 4/7 state and the 3/7 state is missing, resembling the observation that the v = 3 is weaker than the v = 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.
- Research Organization:
- Sandia National Laboratories
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC04-94AL85000
- OSTI ID:
- 957225
- Report Number(s):
- SAND2004-3161C
- Country of Publication:
- United States
- Language:
- English
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