Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A possible new phase of antagonistic nematogens in a disorienting field   A simple model is proposed for nematogenic molecules that favor perpendicular
orientations as well as parallel ones. (Charged rods, for example, show this
antagonistic tendency.) When a small disorienting field is applied along $z$, a
low density phase $N_-$ of nematic order parameter $S_z<0$ coexists with a
dense biaxial nematic $N_b$. (At zero field, $N_-$ becomes isotropic and $N_b$
uniaxial.) But at stronger fields, a new phase $N_{+4}$, invariant under
$\pi/2$ rotations around the field axis, appears in between $N_-$ and $N_b$.
Prospects for finding the $N_{+4}$ phase experimentally are briefly discussed.

31
The categories of this paper are: ao-sci
24
The categories of this paper are: dg-ga
36
The categories of this paper are: cmp-lg
10
The categories of this paper are: q-bio
18
The categories of this paper are: econ
6
The categories of this paper are: astro-ph
1
The categories of this paper are: cs
14
The categories of this paper are: math-ph
20
The categories of this paper are: acc-phys
16
The categories of this paper are: stat
33
The categories of this paper are: plasm-ph
22
The categories of this paper are: chao-dyn
7
The categories of this paper are: hep-th
2
The categories of this paper are: math
21
The categories of this paper are: adap-org
30
The categories of this paper are: q-alg