Comments on "Competition Between Fractional Quantum Hall Liquid...", by G. Gervais, L. W. Engel, H. L. Stormer, D. C. Tsui, et al (cond-mat/0402169)
Shrivastava, Keshav N.
Original · EN
The quantum Hall effect in ultra-high mobility GaAs/AlGaAs has been measured and plateaus are found at many different fractions. The resistivity is quantized as ρ=h/ie² where i exhibits many different values. The fractions 5/3, 8/5, 11/7, 14/9, 17/11 fit the formula, i=3p± 2/(2p ± 1) and it is claimed that 2p flux quanta are attached to the electron. The fractions 4/11, 7/11, 12/7, 13/8 and 15/11 do not fit the expression for i, even then the authors insist that flux quanta are attached to the electron and hence composite fermions (CF) are formed. We report that the interpretation of the experimental data in terms of CF is incorrect.
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