Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Valence bond solid and possible deconfined quantum criticality in an
  extended kagome lattice Heisenberg antiferromagnet   We present numerical evidence for the emergence of an extended valence bond
solid (VBS) phase at $T=0$ in the kagome $S=1/2$ Heisenberg antiferromagnet
with ferromagnetic further-neighbor interactions. The VBS is located at the
boundary between two magnetically ordered regions and extends close to the
nearest-neighbor Heisenberg point. It exhibits a diamond-like singlet covering
pattern with a $12$-site unit-cell. Our results suggest the possibility of a
direct, possibly continuous, quantum phase transition from the neighboring
$\mathbf{q}=0$ coplanar magnetically ordered phase into the VBS phase.
Moreover, a second phase which breaks lattice symmetries, and is of likely
spin-nematic type, is found close to the transition to the ferromagnetic phase.
The results have been obtained using numerical Exact Diagonalization. We
discuss implications of our results on the nature of nearest-neighbor
Heisenberg antiferromagnet.

30
The categories of this paper are: q-alg
12
The categories of this paper are: nucl-th
7
The categories of this paper are: hep-th
32
The categories of this paper are: atom-ph
35
The categories of this paper are: mtrl-th
1
The categories of this paper are: cs
18
The categories of this paper are: econ
6
The categories of this paper are: astro-ph
9
The categories of this paper are: nlin
16
The categories of this paper are: stat
27
The categories of this paper are: comp-gas
21
The categories of this paper are: adap-org
17
The categories of this paper are: q-fin
29
The categories of this paper are: funct-an
10
The categories of this paper are: q-bio
36
The categories of this paper are: cmp-lg