pythtb.Wannier.Amn

property Wannier.Amn

Overlap matrix between reference states and trial wavefunctions.

The overlap matrix is defined as

\[A(\mathbf{k})_{mn} = \langle \psi_{m \mathbf{k}} | t_{n} \rangle\]

where \(|\psi_{n\mathbf{k}}\rangle\) are the Bloch energy eigenstates and \(|t_j\rangle\) are the trial wavefunctions.

Returns:

np.ndarray or None

Last computed overlap matrix, if available.