| Back to the main page of this manual | Input reference of CP2K version 2023.1 | 
CP2K_INPUT /
               FORCE_EVAL /
               DFT /
               TDDFPT| CONVERGENCE {Real} | |
| The convergence of the eigenvalues | |
| This keyword cannot be repeated and it expects precisely one real. | |
| Default value: 1.00000000E-005 | |
| Alias names for this keyword: CONV | 
| DIAG_METHOD {Keyword} | |
| Diagonalization method used in tddfpt | |
| This keyword cannot be repeated and it expects precisely one keyword. | |
| Default value: DAVIDSON | |
| List of valid keywords: 
 | |
| Alias names for this keyword: DIAGONALIZATION_METHOD, METHOD | 
| INVERT_S {Logical} | |
| use the inverse of the overlap matrix | |
| This keyword cannot be repeated and it expects precisely one logical. | |
| The lone keyword behaves as a switch to .TRUE. | |
| Default value: .TRUE. | |
| Alias names for this keyword: INVERT_OVERLAP | 
| KERNEL {Logical} | |
| compute the kernel (debug purpose only) | |
| This keyword cannot be repeated and it expects precisely one logical. | |
| The lone keyword behaves as a switch to .TRUE. | |
| Default value: .TRUE. | |
| Alias names for this keyword: DO_KERNEL | 
| LSD_SINGLETS {Logical} | |
| compute singlets using lsd vxc kernel | |
| This keyword cannot be repeated and it expects precisely one logical. | |
| The lone keyword behaves as a switch to .TRUE. | |
| Default value: .FALSE. | 
| MAX_KV {Integer} | |
| maximal number of Krylov space vectors | |
| This keyword cannot be repeated and it expects precisely one integer. | |
| Default value: 60 | |
| Alias names for this keyword: MAX_VECTORS | 
| NEV {Integer} | |
| number of excitations to calculate | |
| This keyword cannot be repeated and it expects precisely one integer. | |
| Default value: 1 | |
| Alias names for this keyword: N_EV, EV | 
| NLUMO {Integer} | |
| number of additional unoccupied orbitals | |
| This keyword cannot be repeated and it expects precisely one integer. | |
| Default value: 5 | 
| NREORTHO {Integer} | |
| number of reorthogonalization steps | |
| This keyword cannot be repeated and it expects precisely one integer. | |
| Default value: 2 | |
| Alias names for this keyword: N_REORTHO, REORTHO, REORTHOGONALITAZIONS | 
| OE_CORR {Keyword} | |
| Which type of orbital eigenvalue correction to use\n(to yield better HOMO-LUMO energies) | |
| This keyword cannot be repeated and it expects precisely one keyword. | |
| Default value: NONE | |
| List of valid keywords: 
 | |
| Alias names for this keyword: ORBITAL_EIGENVALUES_CORRECTION | 
| PRECONDITIONER {Logical} | |
| use the preconditioner (only for Davidson) | |
| This keyword cannot be repeated and it expects precisely one logical. | |
| The lone keyword behaves as a switch to .TRUE. | |
| Default value: .TRUE. | |
| Alias names for this keyword: PRECOND | 
| RESTARTS {Integer} | |
| maximal number subspace search restarts | |
| This keyword cannot be repeated and it expects precisely one integer. | |
| Default value: 5 | |
| Alias names for this keyword: N_RESTARTS | 
| RES_ETYPE {Keyword} | |
| (singlets/triplets) for restricted calculation | |
| This keyword cannot be repeated and it expects precisely one keyword. | |
| Default value: S | |
| List of valid keywords: 
 | |
| Alias names for this keyword: RESTRICTED_EXCITATIONS_TYPE, RES_E_TYPE | 
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