Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Phonon-mediated drag at $\nu=1/2$: A test of the Chern-Simons composite
  fermion theory   We report on a study of the phonon-mediated frictional drag between
two-dimensional electron layers at the Landau level filling factor $\nu=1/2$
predicted by Chern-Simons composite-fermion theory. Frictional drag between
widely spaced layers is dominated by the phonon-mediated interaction and is
altered from its zero-field form because of the large composite-fermion
effective mass and, less strongly, by magnetic local-field effects. We find
that the reduced drag resistance $\rho(T)/T^2$ peaks at a larger temperature
and has a different density dependence than at zero field. We compare these
results with recent experimental findings.

28
The categories of this paper are: alg-geom
7
The categories of this paper are: hep-th
23
The categories of this paper are: solv-int
36
The categories of this paper are: cmp-lg
2
The categories of this paper are: math
33
The categories of this paper are: plasm-ph
30
The categories of this paper are: q-alg
22
The categories of this paper are: chao-dyn
32
The categories of this paper are: atom-ph
35
The categories of this paper are: mtrl-th
25
The categories of this paper are: patt-sol
15
The categories of this paper are: nucl-ex
0
The categories of this paper are: hep-ph
1
The categories of this paper are: cs
8
The categories of this paper are: hep-ex
34
The categories of this paper are: chem-ph