ClassicalSpinMonteCarlo

Adds an interaction between spin1 located at basis site b1 of the given unitcell and spin2 at basis site b2 in a unit cell that is offset by offset lattice vectors. The exchange energy is calculated as spin1'.M.spin2.

localH(lattice::Lattice{D}, site::Int)::NTuple{3, Float64}  where {D}

only for no on-site interaction. e.g., Js_is_i

@recipe plot(lattice::Lattice{D}; spinscale=0.5) where {D}

Define the recipe for the visualization of a lattice and the spin configuration.