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109 lines
2.6 KiB
ReStructuredText
109 lines
2.6 KiB
ReStructuredText
.. _module_kohn_sham_rs:
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.. program:: kohn_sham_rs
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.. default-role:: option
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============
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kohn_sham_rs
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============
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Quick description
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-----------------
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The Range-separated Kohn-Sham module performs *Restricted* range-separated Hybrid calculation,
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which means that only the long-range part of the *exact* exchange is taken into account.
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The program associated to it is the :ref:`rs_ks_scf` executable.
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.. seealso::
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The documentation of the :ref:`module_dft_keywords` module for the various keywords
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such as the exchange/correlation functionals or the range-separation parameter.
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.. seealso::
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To see the keywords/options associated to the |SCF| algorithm itself,
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see the documentation of the :ref:`module_scf_utils` module.
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More advanced description
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-------------------------
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The splitting of the interaction between long- and short-range is determined by the range-separation parameter :option:`ao_two_e_erf_ints mu_erf`. The long-range part of the interaction is explicitly treated with exact exchange, and the short-range part of the interaction is treated with appropriate DFT functionals.
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The Range-separated Kohn-Sham in an SCF and therefore is based on the :ref:`module_scf_utils` structure.
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The definition of the Fock matrix is in :file:`kohn_sham_rs fock_matrix_rs_ks.irp.f`
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.. seealso::
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For a more detailed description of the |SCF| structure,
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see the documentation of the :ref:`module_scf_utils` module.
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EZFIO parameters
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----------------
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.. option:: energy
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Energy range separated hybrid
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Programs
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--------
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* :ref:`rs_ks_scf`
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Providers
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---------
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.. c:var:: rs_ks_energy
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File : :file:`rs_ks_energy.irp.f`
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.. code:: fortran
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double precision :: rs_ks_energy
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double precision :: two_e_energy
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double precision :: one_e_energy
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double precision :: fock_matrix_energy
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double precision :: trace_potential_xc
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Range-separated Kohn-Sham energy containing the nuclear repulsion energy, and the various components of this quantity.
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Needs:
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.. hlist::
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:columns: 3
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* :c:data:`ao_num`
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* :c:data:`ao_one_e_integrals`
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* :c:data:`ao_potential_alpha_xc`
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* :c:data:`ao_two_e_integral_alpha`
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* :c:data:`e_correlation_dft`
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* :c:data:`e_exchange_dft`
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* :c:data:`fock_matrix_ao_alpha`
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* :c:data:`nuclear_repulsion`
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* :c:data:`scf_density_matrix_ao_alpha`
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* :c:data:`scf_density_matrix_ao_beta`
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Needed by:
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.. hlist::
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:columns: 3
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* :c:data:`extra_e_contrib_density`
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Subroutines / functions
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-----------------------
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