Comments on ``Evidence of Landau Levels and Interactions in Low-Lying Excitations of Composite Fermions ..." by Dujovne, Pinczuk, Kang, Dennis, Pfeiffer and West, cond-mat/0211022

Details Comments on ``Evidence of Landau Levels and Interactions in Low-Lying Excitations of Composite Fermions ..." by Dujovne, Pinczuk, Kang, Dennis, Pfeiffer and West, cond-mat/0211022 Comments on ``Evidence of Landau Levels and Interactions in Low-Lying Excitations of Composite Fermions ..." by Dujovne, Pinczuk, Kang, Dennis, Pfeiffer and West, cond-mat/0211022

2002-11-12

arxiv.org/abs/cond-mat/0211223v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

5 pages TeX

Scientific paper

Dujavne et al suggest that the observed spectra are a result of spin-split Landau levels and spin-flip energies reveal composite fermion interactions. We find that the CF effective field formula is incorrect. In fact, CF model is independent of spin so that the interpretations of data by Dujovne et al in terms of CF model are incorrect. It may be pointed out that the experimental mass of the quasiparticles is several orders of magnitude smaller than the CF mass.

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