Heisenberg Hamiltonian
We begin our study of spangolite by determining the parameters of the Heisenberg Hamiltonian
$$H={\sum}_{i < j}{J}_{ij}{{{\bf{S}}}}_{i}\cdot {{{\bf{S}}}}_{j}$$
(1)
using the density…
We begin our study of spangolite by determining the parameters of the Heisenberg Hamiltonian
$$H={\sum}_{i < j}{J}_{ij}{{{\bf{S}}}}_{i}\cdot {{{\bf{S}}}}_{j}$$
(1)
using the density…