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cond-mat.mes-hall2004
Comments on "Anomalous-Filling-Factor-Dependent Nuclear Spin Polarization in a 2D Electron System: Quantum Hall Effect" by J.H.Smet, K. von Klitzing et al, Phys. Rev. Lett. 92, 086802(2004)
Keshav N. Shrivastava
We find that the nuclear-spin polarization has not been treated correctly. The references given are those of wrong papers. The credits assigned for discoveries are also not correct…
cond-mat.mes-hall2004
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)
Keshav N. Shrivastava
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/ie^2 where i ex…