SHAKETOL: Difference between revisions
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{{TAG|SHAKETOL}} specifies the tolerance for the SHAKE algorithm. | {{TAG|SHAKETOL}} specifies the tolerance for the SHAKE algorithm. | ||
If the error for all geometric constraints does not decrease below this predefined tolerance within the allowed number of iterations ({{TAG|SHAKEMAXITER}}), VASP terminates with an error message. This behavior can be changed by defining the soft convergence tolerance {{TAG| | If the error for all geometric constraints does not decrease below this predefined tolerance within the allowed number of iterations ({{TAG|SHAKEMAXITER}}), VASP terminates with an error message. This behavior can be changed by defining the soft convergence tolerance {{TAG|SHAKETOLSOFT}} > {{TAG|SHAKETOL}}, in which case the algorithm will not terminate if at least accuracy specified by {{TAG|SHAKETOLSOFT}} was reached. | ||
== Related tags and articles == | == Related tags and articles == | ||
Latest revision as of 10:15, 14 February 2026
SHAKETOL = [Real]
Default: SHAKETOL = [math]\displaystyle{ 10^{-5} }[/math]
Description: SHAKETOL specifies the tolerance for the SHAKE algorithm (in case VASP was compiled with -Dtbdyn).
Constrained molecular dynamics (MDALGO=1 | 2 | 3 | 4 | 5) are performed using a SHAKE algorithm.[1]
SHAKETOL specifies the tolerance for the SHAKE algorithm. If the error for all geometric constraints does not decrease below this predefined tolerance within the allowed number of iterations (SHAKEMAXITER), VASP terminates with an error message. This behavior can be changed by defining the soft convergence tolerance SHAKETOLSOFT > SHAKETOL, in which case the algorithm will not terminate if at least accuracy specified by SHAKETOLSOFT was reached.
Related tags and articles
SHAKETOLSOFT, SHAKEMAXITER, MDALGO