Composite fermions and the energy gap in the fractional quantum Hall effect
Copyright policy )Composite fermions and the energy gap in the fractional quantum Hall effect
The energy gaps for the fractional quantum Hall effect at filling fractions 1/3, 1/5, and 1/7 have been calculated by variational Monte Carlo using Jain's composite fermion wave functions before and after projection onto the lowest Landau level. Before projection there is a contribution to the energy gaps from the first excited Landau level. After projection this contribution vanishes, the quasielectron charge becomes more localized, and the Coulomb energy contribution increases. The projected gaps agree well with previous calculations, lending support to the composite fermion theory.
12 pages, Revtex 3.0, 2 compressed and uuencoded postscript figures appended, NHMFL-94-0627
- Florida Southern College United States
- National High Magnetic Field Laboratory United States
- Florida State University United States
- National High Magnetic Field Laboratory United States
Condensed Matter (cond-mat), FOS: Physical sciences, Condensed Matter
Condensed Matter (cond-mat), FOS: Physical sciences, Condensed Matter
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