magnopy.SpinHamiltonian.p41#
property
- property SpinHamiltonian.p41: list#
Parameters of (four spins & one site) term of the Hamiltonian.
\[\boldsymbol{J}_{4,1}(\boldsymbol{r}_{\alpha})\]of the term
\[C_{4,1} \sum_{\mu, \alpha, i, j, u, v} J^{ijuv}_{4,1}(\boldsymbol{r}_{\alpha}) S_{\mu,\alpha}^i S_{\mu,\alpha}^j S_{\mu,\alpha}^u S_{\mu,\alpha}^v\]- Returns:
- parameterslist
List of parameters. The list has a form of
[[alpha, J], ...]
0 <= len(parameters) <= len(spinham.atoms.names).where
alphais an index of the atom to which the parameter is assigned andJis a (3, 3, 3, 3) numpy.ndarray. The parameters are sorted by the index of an atomalphain the ascending order.