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akikucoco

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[交流] 【讨论】ADF能否z在考虑spin orbit相对论效应下计算吸收光谱

相对论效应包含两层,一层是我们通常所说的scalar relative effect,考虑的是不同轨道的能量变化,另外一个就是自旋轨道耦合效应,考虑的事能级的分裂.一般计算包含过度态金属的模型的电子结构方面的性质时,必须考虑后者.
   ADF软件可以考虑自旋轨道偶合,那么计算吸收光谱的时候能否考虑spin orbit呢?
   我在计算的过程发现, spin orbit 不支持EXCITATION, CD计算.
   是我哪里错了吗?
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akikucoco

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引用回帖:
Originally posted by akikucoco at 2010-12-09 12:47:06:
相对论效应包含两层,一层是我们通常所说的scalar relative effect,考虑的是不同轨道的能量变化,另外一个就是自旋轨道耦合效应,考虑的事能级的分裂.一般计算包含过度态金属的模型的电子结构方面的性质时,必须考虑后 ...

恩,明白,我也一直这么认为,就是觉得作为计算软件,应该会考虑到开壳层计算,有点不确定.谢谢你哦!
4楼2010-12-10 12:44:44
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akikucoco(金币+5): 2010-12-10 12:41:55
akikucoco(金币+1): xx 2011-04-11 16:30:23
adf 2006以上版本支持旋轨耦合tddft计算,仅用于参考态为闭壳层的体系
2楼2010-12-09 22:50:44
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mchen10

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akikucoco(金币+5): 2010-12-10 12:43:25
akikucoco(金币+1): 2011-04-11 16:30:00
Guess you can calculate it separately, and correct the excitation energy with it..

However..
spin-orbit in ADF is far from good. for the same molecule with different electronic states, ADF will give the same spin-orbit correction. That means ground state and excited state will have the same spin-orbit calculation result, thus there is no correction can be made.

Nwchem will be a solution. Gamess might do it, but i wonder if it supports SO-ECP.
3楼2010-12-10 00:51:19
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akikucoco

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引用回帖:
Originally posted by beefly at 2010-12-09 22:50:44:
adf 2006以上版本支持旋轨耦合tddft计算,仅用于参考态为闭壳层的体系

Thank you very much. I will make a try with the softs you have mensioned.
5楼2010-12-10 12:46:53
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