Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Stability and effective masses of composite-fermions in the first and
  second Landau Level   We propose a measure of the stability of composite fermions (CF's) at
even-denominator Landau-level filling fractions. Assuming Landau-level mixing
effects are not strong, we show that the CF liquid at $\nu=2+1/2$ in the $n=1$
Landau level cannot exist and relate this to the absence of a hierarchy of
incompressible states for filling fractions $2+1/3 < \nu < 2+2/3$. We find that
a polarized CF liquid should exist at $\nu=2+1/4$. We also show that, for CF
states, the variation with system size of the ground state energy of
interacting electrons follows that for non-interacting particles in zero
magnetic field. We use this to estimate the CF effective masses.

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The categories of this paper are: chao-dyn
9
The categories of this paper are: nlin
6
The categories of this paper are: astro-ph
37
The categories of this paper are: supr-con
11
The categories of this paper are: hep-lat
35
The categories of this paper are: mtrl-th
18
The categories of this paper are: econ
3
The categories of this paper are: physics
1
The categories of this paper are: cs
8
The categories of this paper are: hep-ex
31
The categories of this paper are: ao-sci
26
The categories of this paper are: bayes-an
30
The categories of this paper are: q-alg
14
The categories of this paper are: math-ph
29
The categories of this paper are: funct-an
34
The categories of this paper are: chem-ph