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a1597916(½ð±Ò+1):лл²ÎÓë
gavinliu7390(½ð±Ò+1):лл½»Á÷£¡ 2010-04-25 23:28
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2Â¥2010-04-25 20:56:37
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a1597916(½ð±Ò+1): 2010-04-26 00:52
zzy870720z(½ð±Ò+1): ллָ½Ì 2011-09-03 17:22:25
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3Â¥2010-04-25 20:57:34
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mudannanzi

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a1597916(½ð±Ò+1):лл²ÎÓë
zzy870720z(½ð±Ò+1): ллÌáʾ 2011-09-03 17:22:35
energy°Ñ  STM Ñ¡ÏîÑ¡ÉϾÍokÁË
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4Â¥2010-04-26 08:33:18
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2Â¥: Originally posted by franch at 2010-04-25 20:56:37:
Ëãenergy µÄʱºò°Ñ  STM Ñ¡ÏîÑ¡ÉϾÍÐÐÁË£¬£¬£¬

Õâ¸úMSµÄ°æ±¾ÓйØÃ´  ÎÒ³¢ÊÔËãenergy  ÔõôûÓÐSTMÑ¡ÏîÄØ  

¼ÈÈ»MS¿ÉÒÔÄ£Ä⣬ÄÇVASP¿ÉÒÔô
5Â¥2011-09-03 14:42:59
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zzy870720z(½ð±Ò+2): ллָ½Ì 2011-09-03 17:22:53
ÒýÓûØÌû:
5Â¥: Originally posted by º«DСϣ at 2011-09-03 14:42:59:
Õâ¸úMSµÄ°æ±¾ÓйØÃ´  ÎÒ³¢ÊÔËãenergy  ÔõôûÓÐSTMÑ¡ÏîÄØ  

¼ÈÈ»MS¿ÉÒÔÄ£Ä⣬ÄÇVASP¿ÉÒÔô

²ÉÓÃVASP½øÐÐSTMµÄ¼ÆËã²½Ö裺
It works like this:
1) Relax.
2) Calculate CHGCAR and W***ECAR for the relaxed structure.
3) Generate PARCHG - partial density charge using the CHGCAR and W***ECAR.

PARCHG has the same format as CHGCAR. It is a density for a certain energy range.
It is calculated by setting LPARD=.TRUE.
The decisive parameters are NBMOD and EINT.
If NBMOD=-3 (the most sensible setting), then EINT contains an energy interval with respect to Fermi energy, for which the partial density will be evaluated.
For more details, see the pardens.F file.

Thus, the typical setup for generating PARCHG for STM is:
LPARD=.TRUE.
NBMOD=-3
EINT=-0.1 0.1
(plus other standart INCAR settings)

As soon as you have PARCHG, you can calculate the STM images
either by showing one plane of the PARCHG (constant distance mode) or showing some isosurface (constant current mode).
In our group an utility th_stm was used together with the data explorer (www.opendx.org).
However -
I just finished working on the STM applet for p4vasp
6Â¥2011-09-03 15:55:59
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