1 citations · 1 across the 29 of their papers we have counts for
39 papers
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…
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…
Doubling of Landau levels in GaAs/AlGaAs heterostructures
Keshav N. Shrivastava
Usually the Landau levels are given by (n+1/2)\hbarω_c with \hbarω_c=eB/mc. We find that there are clusters of electrons with localization so that the orbital angular momentum is n…
Microwave resonance in 2D Wigner crystals
Keshav N. Shrivastava
Recent experimental measurements of the microwave absorption in the frequency range 1-4 GHz show peaks at several values of the filling factor,ν=nh/eB. Since the filling factor mul…
Clustering in quantum Hall effect: Spin-charge coupling
Keshav N. Shrivastava
The effective fractional charges like 17/4 or 19/4 are explained by our angular momentum theory. These fractions do not arise from the odd denominator rule. Due to spin polarizatio…
Comments on `` Scattering of bunched fractionally charged quasiparticles" by Chung, Heiblem and Umansky, cond-mat/0305325
Keshav N. Shrivastava
In the experiments, the quantity measurd is the product of the charge and the magnetic field from which fractional charge is deduced. There is no objection to measuring the fractio…