Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
1996-11-11
Phys. Rev. B 55, 1934 (1997)
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
5 pages, 3 ps-figures, revtex with epsf.tex and multicol.sty. To appear in Physical Review B
Scientific paper
10.1103/PhysRevB.55.R1934
We study the charged excitations of quantum Hall systems at integer filling fractions $\nu=2n+1$, for a force-law that takes account of the finite width of the electron gas. For typical values of this width, in the limit of vanishing Zeeman energy we find that the low-energy excitations are ``skyrmions'' not only at $\nu=1$ but also at higher filling fractions. Our results lead to the prediction that, in typical samples, abrupt transitions to charged excitations with very large spins should be observable at filling fractions higher than $\nu=1$ if the Zeeman energy is reduced sufficiently.
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