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cond-mat.mes-hall2000
Hysteresis effect in ν=1 quantum Hall system under periodic electrostatic modulation
Ming-Che Chang, Min-Fong Yang
The effect of a one-dimensional periodic electrostatic modulation on quantum Hall systems with filling factor ν=1 is studied. We propose that, either when the amplitude of the modu…
cond-mat.mes-hall2000
Comment on "Theory of diluted magnetic semiconductor ferromagnetism"
Min-Fong Yang, Shih-Jye Sun, Ming-Che Chang
In this comment, we emphasize that the self-consistent spin wave theory in a recent paper [J. K"onig, H.-H. Lin, and A. H. MacDonald, Phys. Rev. Lett. 84, 5628 (2000)] leads to inc…