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adf:spin-density2020 [2024/03/12 11:02] – [参数设置如下:] liu.jun | adf:spin-density2020 [2024/03/12 12:37] (当前版本) – [原子电荷、自旋电荷数据] liu.jun | ||
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=====查看结果:===== | =====查看结果:===== | ||
+ | ====分布图==== | ||
SCM - View - Properties - Spin density,经过短暂计算(小分子几秒钟,分子越大耗时越长,但一般不会超过几分分钟的量级)即可看到自旋密度,设置图像透明(参考:[[adf: | SCM - View - Properties - Spin density,经过短暂计算(小分子几秒钟,分子越大耗时越长,但一般不会超过几分分钟的量级)即可看到自旋密度,设置图像透明(参考:[[adf: | ||
行 24: | 行 24: | ||
* 第一行表示名为C-n(n=1,2,3,4,5……数字没有意义,仅仅是为区分名字)的数据是SCF(电子自洽场计算)得到的自旋A的电子密度减去自旋B的电子密度; | * 第一行表示名为C-n(n=1,2,3,4,5……数字没有意义,仅仅是为区分名字)的数据是SCF(电子自洽场计算)得到的自旋A的电子密度减去自旋B的电子密度; | ||
* 第二行打勾,表示显示该行数据,本例中也就是C-1,即自旋密度 | * 第二行打勾,表示显示该行数据,本例中也就是C-1,即自旋密度 | ||
+ | ====原子电荷、自旋电荷数据==== | ||
+ | Mulliken、Hershfield、Voronoi等电荷、自旋电荷数据较好理解,在SCM → Output → Mulliken Charge Analysis即可看到。这里重点讲一下Multipole Derived Charge(MDC)。 | ||
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+ | * <color lightgrey> | ||
+ | * <color lightgrey> | ||
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+ | * <color lightgrey> | ||
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+ | SCM → Output 中给出的MDC-m、MDC-d、MDC-q | ||
+ | < | ||
+ | |||
+ | MDC atomic charges (includes spinA + spinB electrons) | ||
+ | |||
+ | |||
+ | The MDC-m charges are just the Monopole terms in the multipole expansion, while for the MDC-d charges | ||
+ | also the Dipoles are reconstructed. The usually preferred charges are the MDC-q charges. | ||
+ | These reconstruct the Monopoles, Dipoles and Quadrupoles (both atomic AND molecular). | ||
+ | |||
+ | Given here are the atomic charges of both spins added. These should be compared | ||
+ | to the values from a " | ||
+ | |||
+ | Atom Level: | ||
+ | | ||
+ | | ||
+ | | ||
+ | |||
+ | |||
+ | MDC spin density (spinA - spinB) | ||
+ | |||
+ | | ||
+ | per atom, which usually are regarded as spin densities. | ||
+ | |||
+ | Atom Level: | ||
+ | | ||
+ | | ||
+ | | ||
+ | |||
+ | </ | ||
+ | MDC-m,其中m的含义是Mono-Pole,单极的意思。类似地,MDC-d、MDC-q是偶极、四极的意思。 | ||
+ | |||
+ | 上面数据中,MDC atomic charges和MDC spin density (spinA - spinB),有MDC-m、MDC-d、MDC-q,分别表示只考虑到单极(也就是零级近似),以及单极、偶极(即到二级近似),以及单极、偶极、四极(四级近似)。最精确的是第三列数据。 | ||
AMS软件提供**免费试用**,试用申请方式参考:[[adf: | AMS软件提供**免费试用**,试用申请方式参考:[[adf: |