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huang1995

新虫 (小有名气)

[求助] LEPSILON介电函数计算

请问一下,1.vasp计算LOPTICS=.TRUE和LEPSILON=. TRUE都是计算介电函数的么,前面算出的是介电函数的实部虚部,后面的是3*3个矩阵,这俩有什么联系吗?

2.最近在算EPSILON,发现和K点的值影响很大,但是有的确没有啥影响,不知道是不是因为有的体系不能计算EPSILON呢?下面是Si和Pd计算epsilon,只改动了k点,INCAR是一样的。

吐槽一下,平台居然不能拖拽直接上传图片吗,才发现我传不了图片,换了3个浏览器都不行。

Sample Text

MACROSCOPIC STATIC DIELECTRIC TENSOR (including local field effects in DFT)
------------------------------------------------------
          13.359785    -0.000000     0.000000
           0.000000    13.359785    -0.000000
           0.000000    -0.000000    13.359785
------------------------------------------------------

MACROSCOPIC STATIC DIELECTRIC TENSOR (including local field effects in DFT)
------------------------------------------------------
          12.913191    -0.000000    -0.000000
          -0.000000    12.913191    -0.000000
           0.000000    -0.000000    12.913191
------------------------------------------------------

MACROSCOPIC STATIC DIELECTRIC TENSOR (including local field effects in DFT)
------------------------------------------------------
          12.908716     0.000000     0.000000
          -0.000000    12.908716     0.000000
          -0.000000     0.000000    12.908716
------------------------------------------------------


Sample Text
MACROSCOPIC STATIC DIELECTRIC TENSOR (including local field effects in DFT)
------------------------------------------------------
      -92975.101090    -0.027112    -0.019171
          -0.027112-92975.095151    -0.013556
          -0.019171    -0.013556-92975.108892
------------------------------------------------------

MACROSCOPIC STATIC DIELECTRIC TENSOR (including local field effects in DFT)
------------------------------------------------------
      271477.643861     0.079163     0.055977
           0.079163271477.626519     0.039582
           0.055977     0.039582271477.666641
------------------------------------------------------
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huang1995

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上面是Si 5*5*5 10*10*10 15*15*15的K点
下面是Pd 11*11*11 22*22*22
2楼2022-09-29 14:03:15
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