Fractional quantum Hall effect in higher Landau levels

Details Fractional quantum Hall effect in higher Landau levels Fractional quantum Hall effect in higher Landau levels

1994-09-06

arxiv.org/abs/cond-mat/9409020v1

Physics

Condensed Matter

7 pages RevTex, 4 figures

Scientific paper

10.1016/0038-1098(95)00034-8

We investigate, using finite size numerical calculations, the spin-polarized fractional quantum Hall effect (FQHE) in the first excited Landau level (LL). We find evidence for the existence of an incompressible state at $\nu = \frac{7}{3} = 2+\frac{1}{3}$, but not at $\nu = 2+\frac{2}{5}$. Surprisingly, the 7/3 state is found to be strongest at a finite thickness. The structure of the low- lying excited states is found to be markedly different from that in the lowest LL. This study also rules out FQHE at a large number of odd-denominator fractions in the lowest LL.

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