Néel order in the ground state of Heisenberg antiferromagnetic chains with long-range interactions
J. Rodrigo Parreira, Oscar Bolina, J Fernando Perez
We consider the ground state of one-dimensional antiferromagnets with long-range interactions with Hamiltonian given by where , with J>0. We prove Néel order for all if the spin s is sufficiently large. We also prove the absence of long-range order when for any spin value.
Journal of Physics A Mathematical and General•Feb 21, 1997•11 citations