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Thebluedream

铜虫 (小有名气)

[求助] 哪位介绍下超晶胞 已有1人参与

楼主本科生一枚,最近跟着老师做下有关晶体的研究,老师布置了任务让了解下超晶胞。希望有好心的给俺科普一下百度上没有的知识

[ Last edited by linhua0402313 on 2016-10-8 at 08:05 ]
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Jesuslovesme

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A surface supercell is obtained if, instead of defining the unit cell as the smallest possible repeat unit in the surface, a larger repeat unit is used. You can specify the structure of a supercell by defining its range in unit cells. The new structure will have p1 symmetry and lattice vectors that are multiples of the original unit cell vectors. The concept of a supercell is essential for studying lattice vibrations and to build up structures with substitutional, interstitial or magnetic disorder.

When a supercell is created, no objects are destroyed. However, the symmetry relationships between objects are redefined. As a result, certain atoms which were previously related by translational symmetry are no longer symmetry related and can move independently.
我只有一件事,就是忘记背后,努力面前,向着标杆直跑!
2楼2016-11-23 09:59:03
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Jesuslovesme

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参考MS的HELP文件
我只有一件事,就是忘记背后,努力面前,向着标杆直跑!
3楼2016-11-23 10:01:05
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lilinxian461

新虫 (小有名气)

引用回帖:
2楼: Originally posted by Jesuslovesme at 2016-11-23 09:59:03
A surface supercell is obtained if, instead of defining the unit cell as the smallest possible repeat unit in the surface, a larger repeat unit is used. You can specify the structure of a supercell b ...

同问啊,,我又一个问题,我想搭一个1x1x5的晶胞来计算掺杂,但是有的老师说我这样算是不对的,不符合空间对称性,可以有人帮我解答一下吗??、
常见的掺杂都是2X2X2,1X1X2的,这种的意思是我必须要偶数背吗
4楼2017-02-27 18:18:56
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Jesuslovesme

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引用回帖:
4楼: Originally posted by lilinxian461 at 2017-02-27 18:18:56
同问啊,,我又一个问题,我想搭一个1x1x5的晶胞来计算掺杂,但是有的老师说我这样算是不对的,不符合空间对称性,可以有人帮我解答一下吗??、
常见的掺杂都是2X2X2,1X1X2的,这种的意思是我必须要偶数背吗...

只要原来的晶胞是对称的,把它扩大任意倍数之后还是对称的。你搭建的晶胞是哪个金属?什么结构?是自己创建的,还是导入的?

发自小木虫Android客户端
我只有一件事,就是忘记背后,努力面前,向着标杆直跑!
5楼2017-02-27 18:57:27
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