Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Finite-temperature properties of the extended Heisenberg model on a
  triangular lattice   We present numerical results for the $J_1$-$J_2$ Heisenberg model on a
triangular lattice at finite temperatures $T>0$. In contrast to unfrustrated
lattices we reach much lower $T \sim 0.15 J_1$. In static quantities the novel
feature is a quite sharp low-$T$ maximum in the specific heat. Dynamical spin
structure factor $S({\bf q},\omega)$ allows for the extraction of the effective
spin-wave energies $\omega_{\bf q}(T)$ and their damping $\gamma_{\bf q}(T)$.
While for $J_2=0$ our results are consistent with $T=0$ spin ordering, $J_2/J_1
\sim 0.1 $ induces additional frustration with a signature of spin liquid
ground state. In the latter case, results for spin-lattice relaxation rate
indicate in the low-$T$ accesible regime on $1/T_1 \propto T^{\alpha}$ with
$\alpha \geq 1$, as observed in recent spin-liquid materials on a triangular
lattice.

37
The categories of this paper are: supr-con
22
The categories of this paper are: chao-dyn
24
The categories of this paper are: dg-ga
10
The categories of this paper are: q-bio
15
The categories of this paper are: nucl-ex
8
The categories of this paper are: hep-ex
26
The categories of this paper are: bayes-an
16
The categories of this paper are: stat
18
The categories of this paper are: econ
0
The categories of this paper are: hep-ph
11
The categories of this paper are: hep-lat
25
The categories of this paper are: patt-sol
21
The categories of this paper are: adap-org
29
The categories of this paper are: funct-an
19
The categories of this paper are: eess
30
The categories of this paper are: q-alg