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.. _dft_keywords:
.. program :: dft_keywords
.. default-role :: option
============
dft_keywords
============
This module contains the main keywords related to a DFT calculation or RS-DFT calculation, such as:
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* :option: `dft_keywords exchange_functional`
* :option: `dft_keywords correlation_functional`
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* :option: `dft_keywords HF_exchange` : only relevent for the :c:func: `rs_ks_scf` program
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The keyword for the **range separation parameter** :math: `\mu` is the :option: `ao_two_e_erf_integrals mu_erf` keyword.
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The keyword for the type of density used in RS-DFT calculation with a multi-configurational wave function is the :option: `density_for_dft density_for_dft` keyword.
EZFIO parameters
----------------
.. option :: exchange_functional
name of the exchange functional
Default: short_range_LDA
.. option :: correlation_functional
name of the correlation functional
Default: short_range_LDA
.. option :: HF_exchange
Percentage of HF exchange in the DFT model
Default: 0.
Providers
---------
.. c:var :: dft_type
.. code :: text
character*(32) :: dft_type
File: :file: `keywords.irp.f`
defines the type of DFT applied: LDA, GGA etc ...