1303.5249 (R. F. Bishop et al.)

Valence-bond crystalline order in the $s=1/2$ $J_{1}$--$J_{2}$ model on
the honeycomb lattice    [PDF]

R. F. Bishop, P. H. Y. Li, C. E. Campbell

Using the coupled cluster method we study the phase diagram of the spin-1/2 Heisenberg antiferromagnet on a honeycomb lattice with nearest-neighbor exchange coupling $J_{1}>0$ and frustrating next-nearest-neighbor coupling $J_{2} \equiv xJ_{1}>0$. In the range $0View original: http://arxiv.org/abs/1303.5249