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Õâ¸öÊÇvasp forumÀïÃæµÄÒ»¸öÌû×Ó£¬×¢ÒâadminµÄ»ØÌû£º http://cms.mpi.univie.ac.at/vasp-forum/forum_viewtopic.php?3.306 ¡°the reason of this behaviour is that the partial (and ONLY the partial ) magnetizations and charge densities are not symmetrized before they are written to OUTCAR. (the total charge density is, of course) Therefore, the difference in the output stems from the difference in the k-meshes which are generated: if ISYM is switched off, the irreducible part of the Brillouin zone is not determined, hence the k-points are spread all over the 1st BZ, and the partial densities look symmetric, as they in fact are. if ISYM is switched on, only the irreducible part of the BZ is filled with k-points, but for the patrial charges no a-posteriori symmetrisation is done (as should be and is in fact done for the charge densities). Therefore, these partial quantities may differ slightly, even for symmetry-equivalent atoms in a unit cell. ¡± ÎÒÒ²ÊÇÔÚ¼ÆËãÒ»¸öÌåϵµÄpx,pyºÍpzµÄDOSµÄʱºò·¢ÏֶԳƵÄÌåϵ²»Ò»Ñù£¬¾õµÃºÜÆæ¹Ö¡£ ¸Õ¿ªÊ¼ÒÔΪÊÇ×ø±êϵµÄÔÒò£¬±ä»»ÁË×ø±êϵ»¹ÊDz»Í¬¡£ºóÀ´¾ÍËѵ½ÁËÉÏÃæÕâ¸öÌû×Ó¡£ È»ºó¾Í×öÁ˲âÊÔ£¬¶ÔÓÚͬһ¸öÌåϵ£¬ÉèÖÃÁËISYM=0ºÍ1£¬·Ö±ð¼ÆËã²¢±È½Ï¡£ ·¢ÏÖ×ÜDOSÍêȫһÑù£¬µ«ÊǶÔÓÚ·Ö²¨Ì¬ÃܶȾͲ»Ò»ÑùÁË¡£ ÉèÖÃÁËISYM=0£¬Ò²¾ÍÊÇ˵²»²»Èò¼ÀïÔ¨ÇøµÄKµã½øÐмòÔ¼£¬¶øÊǾùÔÈÈöµã£¬Õâ¸ö½á¹ûpx£¬pyºÍpzÍêȫһÑù£¬¸úÔ¤ÏëµÄÒ»Ñù¡£ Õâ¸öÎÊÌâÔÚvaspµÄ¹Ù·½ÊÖ²áÀïûÓп´µ½£¬ËùÒÔÒ»Ö±×öPDOSµÄʱºòûÓп¼Âǵ½ÕâÒ»µã¡£ ²»ÖªµÀ´ó¼ÒÒÔǰÓÐûÓÐ×¢Òâµ½Õâ¸öÎÊÌâ¡£ |
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