ISTART: Difference between revisions

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*{{TAG|ISTART}}=0
*{{TAG|ISTART}}=0
:Start job: "begin from scratch". Initialize the orbitals according to the flag {{TAG|INIWAV}}.
*{{TAG|ISTART}}=1
*{{TAG|ISTART}}=1
:Continuation job: "restart with constant energy cut-off". Orbitals are read from the {{FILE|WAVECAR}} file (usage is restricted in the parallel version).
:The set of plane waves will be redefined and re-padded according to the new cell size/shape ({{FILE|POSCAR}}) and the new plane wave cut-off ({{FILE|INCAR}}).
:These values might differ from the old values, that are stored in the {{FILE|WAVECAR}} file.
:If the {{FILE|WAVECAR}} file is missing or if the {{FILE|WAVECAR}} file contains an inappropriate number of bands and/or k-points the flag {{TAG|ISTART}} will be set to 0 (see above).
*{{TAG|ISTART}}=2
*{{TAG|ISTART}}=2
*{{TAG|ISTART}}=3
*{{TAG|ISTART}}=3

Revision as of 16:09, 28 January 2011

ISTART = 0 | 1 | 2 | 3 

Default: ISTART = 1 if WAVECAR exists
= 0 else

Description: ISTART determines whether or not to read the WAVECAR file.


Start job: "begin from scratch". Initialize the orbitals according to the flag INIWAV.
Continuation job: "restart with constant energy cut-off". Orbitals are read from the WAVECAR file (usage is restricted in the parallel version).
The set of plane waves will be redefined and re-padded according to the new cell size/shape (POSCAR) and the new plane wave cut-off (INCAR).
These values might differ from the old values, that are stored in the WAVECAR file.
If the WAVECAR file is missing or if the WAVECAR file contains an inappropriate number of bands and/or k-points the flag ISTART will be set to 0 (see above).

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