Parameter: Jz

Definition

Coupling constant for the Hund's exchange interaction in z axis, $J_z$.

Type:

Float, double precision

Default value

0.0

Component

ALL

Behavior

It is used to determine the Coulomb interaction matrix.

Comment

Actually, only the NARCISSUS component needs it. For the other quantum impurity solvers components (such as the MANJUSHAKA component), the information about the Coulomb interaction matrix is imported via the atom.cix file. So you can set it to any values for the MANJUSHAKA component.

Usually, the $U_c$, $U_v$ and $J_z$ should satisfy the following relation:

\[\begin{equation} U_c = U_v - 2J_z \end{equation}\]

See also Uc, Uv parameters for more details.

Usually, $J_z = J_s = J_p = J$. As for a single-band model, they are zero. See also Js, Jp parameters for more details.