howto:cdft
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howto:cdft [2018/11/02 12:45] – [Available constraints] nholmber | howto:cdft [2018/11/02 13:11] – [Structure of input file] nholmber | ||
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- Constraint weight function specific settings (Becke/ | - Constraint weight function specific settings (Becke/ | ||
- | In the above example, a Becke constraint is selected using the keyword [[inp> | + | In the above example, a Becke constraint is selected using the keyword [[inp> |
{{ howto: | {{ howto: | ||
- | **Figure | + | **Figure |
The OUTER_SCF section within the CDFT section defines settings for the CDFT SCF loop. The keyword [[inp> | The OUTER_SCF section within the CDFT section defines settings for the CDFT SCF loop. The keyword [[inp> | ||
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<note important> | <note important> | ||
- | This tutorial is exactly the same as the Zn dimer example above but using Hirshfeld partitioning based constraints instead of Becke constraints. You can find the input files here. | + | This tutorial is exactly the same as the Zn dimer example above but using Hirshfeld partitioning based constraints instead of Becke constraints. You can find the input files {{: |
It might be instructive to visualize how the Becke and Hirshfeld weight function schemes differ, in particular, how the methods assign a volume to each atom in the system. You can activate the section [[inp> | It might be instructive to visualize how the Becke and Hirshfeld weight function schemes differ, in particular, how the methods assign a volume to each atom in the system. You can activate the section [[inp> | ||
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In the above example input file, a common file '' | In the above example input file, a common file '' | ||
- | The keyword [[inp> | + | The keyword [[inp> |
+ | |||
+ | The keyword [[inp> | ||
+ | |||
+ | A special run type is available for '' | ||
==== Example: Electronic coupling of Zn cation dimer ==== | ==== Example: Electronic coupling of Zn cation dimer ==== | ||
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We can use CDFT states as the basis of a configuration interaction (CI) simulation to correct for SIE in this system. As the figure above shows, CDFT-CI using the PBE functional is able to reproduce the exact dissociation profile. You can read up on the theory behind CDFT-CI simulations from the references given at the start of this tutorial. Very briefly, CDFT-CI simulations involve representing the system' | We can use CDFT states as the basis of a configuration interaction (CI) simulation to correct for SIE in this system. As the figure above shows, CDFT-CI using the PBE functional is able to reproduce the exact dissociation profile. You can read up on the theory behind CDFT-CI simulations from the references given at the start of this tutorial. Very briefly, CDFT-CI simulations involve representing the system' | ||
- | In this tutorial, you will reproduce the DFT and CDFT results from the figure above. You can find the input files here. The reference data used to plot Figure 4 are also included in the zip-folder. Please note that the reference results were obtained with a larger basis set and planewave cutoff as well as tighter convergence criteria than the settings you will be using in this tutorial. | + | In this tutorial, you will reproduce the DFT and CDFT results from the figure above. You can find the input files {{: |
- Start by examining the simulation script '' | - Start by examining the simulation script '' |
howto/cdft.txt · Last modified: 2024/01/03 13:20 by oschuett