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qiwei505

新虫 (小有名气)

[交流] 【求助】现在有什么软件可以准确计算出晶体的能带能隙呢 已有11人参与

我想从理论上对晶体的能带结构进行分析计算,可是得出的结果与实验值差距较大,只能定性的分析。我想问下有没有什么方法可以准确计算出能带结构?哪位老师知道指点一下?尽量详细些,谢谢!
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condensed

木虫 (著名写手)

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gavinliu7390(金币+2):谢谢交流! 2010-04-26 10:58
The GW method


Calculations of ground-state and excited-state properties of materials have been one of
the major goals of condensed matter physics. Ground-state properties of solids have
been extensively investigated for several decades within the standard density functional
theory. Excited-state properties, on the other hand, were relatively unexplored in ab initio
calculations until a decade ago. The most suitable approach up to now for studying excited-
state properties of extended systems is the Green function method. To calculate the Green
function one requires the self-energy operator which is non-local and energy dependent.
In this article we describe the GW approximation which has turned out to be a fruitful
approximation to the self-energy. The Green function theory, numerical methods for
carrying out the self-energy calculations, simplified schemes, and applications to various
systems are described. Self-consistency issue and new developments beyond the GW
approximation are also discussed as well as the success and shortcomings of the GW
approximation.
9楼2010-04-26 10:58:20
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lipeifang82

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小木虫(金币+0.5):给个红包,谢谢回帖交流
gavinliu7390(金币+1):谢谢参与! 2010-05-01 14:40
用weni2k,这个计算的最准
2楼2010-04-26 08:55:06
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qiwei505

新虫 (小有名气)

  weni2k是什么软件? 我好像没见过也没找到,能说清楚点吗,谢谢了
3楼2010-04-26 09:19:53
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lipeifang82

木虫 (小有名气)


小木虫(金币+0.5):给个红包,谢谢回帖交流
wien2k     http://www.wien2k.at/reg_user/mailing_list/  你搜索一下,有很多这个软件的介绍
5楼2010-04-26 09:54:23
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