Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Particle-hole symmetry breaking in a spin-dimer system TlCuCl$_3$
  observed at 100 T   The entire magnetization process of TlCuCl$_3$ has been experimentally
investigated up to 100 T employing the single-turn technique. The upper
critical field $H_{c2}$ is observed to be 86.1 T at 2 K. A convex slope of the
$M$-$H$ curve between the lower and upper critical fields ($H_{c1}$ and
$H_{c2}$) is clearly observed, which indicates that a particle-hole symmetry is
broken in TlCuCl$_3$. By quantum Monte Carlo simulation and the bond-operator
theory method, we find that the particle-hole symmetry breaking results from
strong inter-dimer interactions.

8
The categories of this paper are: hep-ex
0
The categories of this paper are: hep-ph
26
The categories of this paper are: bayes-an
31
The categories of this paper are: ao-sci
20
The categories of this paper are: acc-phys
14
The categories of this paper are: math-ph
34
The categories of this paper are: chem-ph
33
The categories of this paper are: plasm-ph
24
The categories of this paper are: dg-ga
2
The categories of this paper are: math
37
The categories of this paper are: supr-con
12
The categories of this paper are: nucl-th
10
The categories of this paper are: q-bio
1
The categories of this paper are: cs
5
The categories of this paper are: gr-qc
16
The categories of this paper are: stat