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DarkArchon
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liliangfang: ½ð±Ò+2, лл½»Á÷ 2014-02-26 07:48:13
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liliangfang: ½ð±Ò+2, лл½»Á÷ 2014-02-26 07:48:13
|
NELM Êǵç×Ó×ÔÇ¡×î´ó²½Êý£¬³¬¹ýÕâ¸öÊý£¬²»¹ÜÊÕÁ²Óë·ñ£¬¼ÆËã¶¼»áÍ£Ö¹¡£ NELMDL ÊÇ·Ç×ÔÇ¡²½Êý£¬ÔÚÕâЩ²½ÊýÄÚ£¬¼ÆËãÓÃÓÚÐÞÕýººÃܶÙÁ¿£¬¶ø²»ÊÇ×ÔÇ¡¼ÆËã¡£ÔÚÕâЩ²½ÊýÖ®Íâ²Å¿ªÊ¼×ÔÇ¡¡£ÓÃÓÚ°ïÖú¸´ÔӽṹµÄ×ÔÇ¡ÊÕÁ²£¬±ÈÈç±íÃæ£¬·Ö×ÓµÈ |
2Â¥2014-02-25 21:43:28
liufeng0619
Òø³æ (ÕýʽдÊÖ)
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3Â¥2014-02-26 08:45:50
DarkArchon
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NELMDLÖ»ÊǰïÖú²»ÈÝÒ×ÊÕÁ²µÄ½á¹¹¿ìËÙÊÕÁ²£¬±ÈÈçÄãµÄ³õʼ½á¹¹±È½Ï¸´ÔÓ»òÕß²»ÊǺܺÏÀí¡£ËüµÄ¹¦Äܲ»ÄÜÈ¡´úNELM. ÏÂÃæÊÇmanual ÀïÄÚÈÝ£¬Äã×Ðϸ¿´Ò»Ï NELMDL gives the number of non-selfconsistent steps at the beginning; if one initializes the orbitals randomly the initial orbitals are far from anything reasonable. The resulting charge density is also ¡¯nonsense¡¯. Therefore it makes sense to keep the initial Hamiltonian, which corresponds to the superposition of atomic charge densities, fixed during the first few steps. Choosing a ¡¯delay¡¯ for starting the charge density update becomes essential in all cases where the SC-convergence is very bad (e.g. surfaces or molecules/clusters, chains). Without setting a delay VASP will probably not converge or at least the convergence speed is slowed down. NELMDL might be positive or negative. A positive number means that a delay is applied after each ionic movement ¡ª in general not a convenient option. A negative value results in a delay only for the start-configuration. |
4Â¥2014-02-26 16:43:50
liufeng0619
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5Â¥2014-03-01 15:19:29
ÁõСΰ110
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6Â¥2014-03-08 10:54:54
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7Â¥2014-03-08 16:05:52
DarkArchon
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8Â¥2014-03-08 22:41:23













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