Parameter: part

Definition

Hopping (or coupling) parameter $t$ for Hubbard model.

Type

Float, double precision

Default value

0.5

Component

ALL

Behavior

It is used to initialize the default hybridization function $\Delta(i\omega_n)$, and in the implementation of the dynamical mean-field theory self-consistent equation for the Bethe lattice.

Para-magnetic phase:

$$\begin{equation} G_{\alpha\sigma}(i\omega_n) = t^2 \Delta_{\alpha\sigma}(i\omega_n) \end{equation}$$

Anti-ferromagnetic phase:

\begin{equation} G{\alpha\bar{\sigma}}(i\omega_n) = t^2 \Delta{\alpha\bar{\sigma}}(i\omega_n) \end{equation}

Comment

It is useful only when isscf = 2. See also isscf parameter for more details.