Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Role of the dimerized gap due to anion ordering in spin-density wave
  phase of (TMTSF)$_2$ClO$_4$ at high magnetic fields   Magnetoresistance measurements have been carried out along the highly
conducting a axis in the FISDW phase of hydrogened and deuterated
(TMTSF)$_2$ClO$_4$ for various cooling rates through the anion ordering
temperature. With increasing the cooling rate, a) the high field phase boundary
$\beta_{\rm {HI}}$, observed at 27 T in hydrogened samples for slowly cooled,
is shifted towards a lower field, b) the last semimetallic SDW phase below
$\beta_{\rm {HI}}$ is suppressed, and c) the FISDW insulating phase above
$\beta_{\rm {HI}}$ is enhanced in both salts. The cooling rate dependence of
the FISDW transition and of $\beta_{\rm {HI}}$ in both salts can be explained
by taking into account the peculiar SDW nesting vector stabilized by the
dimerized gap due to anion ordering.

12
The categories of this paper are: nucl-th
19
The categories of this paper are: eess
21
The categories of this paper are: adap-org
1
The categories of this paper are: cs
34
The categories of this paper are: chem-ph
24
The categories of this paper are: dg-ga
20
The categories of this paper are: acc-phys
33
The categories of this paper are: plasm-ph
2
The categories of this paper are: math
0
The categories of this paper are: hep-ph
9
The categories of this paper are: nlin
18
The categories of this paper are: econ
23
The categories of this paper are: solv-int
15
The categories of this paper are: nucl-ex
6
The categories of this paper are: astro-ph
14
The categories of this paper are: math-ph