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NAME

       sc::PW91CFunctional -

       The Perdew-Wang 1991 correlation functional computes energies and
       densities using the designated local correlation functional.

SYNOPSIS

       #include <functional.h>

       Inherits sc::DenFunctional.

   Public Member Functions
       PW91CFunctional (const Ref< KeyVal > &)
       PW91CFunctional (StateIn &)
       void save_data_state (StateOut &)
           Save the base classes (with save_data_state) and the members in the
           same order that the StateIn CTOR initializes them.
       int need_density_gradient ()
       void point (const PointInputData &, PointOutputData &)
       void set_spin_polarized (int)

   Protected Member Functions
       void init_constants ()
       double limit_df_drhoa (double rhoa, double gamma, double ec, double
           decdrhoa)

   Protected Attributes
       Ref< LSDACFunctional > local_
       double a
       double b
       double c
       double d
       double alpha
       double c_c0
       double c_x
       double nu

Detailed Description

       The Perdew-Wang 1991 correlation functional computes energies and
       densities using the designated local correlation functional.

       J. P. Perdew, Proceedings of the 75. WE-Heraeus-Seminar and 21st Annual
       International Symposium on Electronic Structure of Solids held in
       Gaussig (Germany), March 11-15, 1991, P. Ziesche and H. Eschrig, eds.,
       pp. 11-20.

       J. P. Perdew, J. A. Chevary, S. H. Vosko, K. A. Jackson, M. R.
       Pederson, and D. J. Singh, Phys. Rev. B, 46, 6671, 1992.

Member Function Documentation

   void sc::PW91CFunctional::save_data_state (StateOut &) [virtual]
       Save the base classes (with save_data_state) and the members in the
       same order that the StateIn CTOR initializes them. This must be
       implemented by the derived class if the class has data.

       Reimplemented from sc::DenFunctional.

Author

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