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[Quantum ESPRESSO] 求助QE模拟红外光谱出错

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    我有一个氢氧化铜吸附有机小分子体系,首先用pw.x优化结构,得到正常收敛的结果。然后用ph.x计算声子,也能正常结束,但得不到dielec相关信息,通过fildyn关键词输出的文件中也没有任何信息。用于ph.x计算的输入文件如下:
  1. Normal modes for Cu001-Val2
  2. &inputph
  3.   tr2_ph= 1.0d-12
  4.   prefix= 'Cu001-Val2'
  5.   epsil= .false.
  6.   trans= .true.
  7.   asr= .true.
  8.   outdir= './'
  9.   fildyn= 'Cu001-Val2_IR.dynG'
  10. /
  11. 0.0 0.0 0.0
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经排查,如果设置epsil= .true. ,则产生如下信息:
  1.      Reading xml data from directory:

  2.      ./Cu001-Val2.save/
  3.      Message from routine read_pp_mesh:
  4.      mesh size missing, using the one in header
  5.      Message from routine read_pp_mesh:
  6.      mesh size missing, using the one in header
  7.      Message from routine read_pp_mesh:
  8.      mesh size missing, using the one in header
  9.      file O.pbe-n-kjpaw_psl.0.1.UPF: wavefunction(s)  2P renormalized
  10.      file C.pbe-n-kjpaw_psl.1.0.0.UPF: wavefunction(s)  2S 2P renormalized

  11.      IMPORTANT: XC functional enforced from input :
  12.      Exchange-correlation= PBE
  13.                            (   1   4   3   4   0   0   0)
  14.      Any further DFT definition will be discarded
  15.      Please, verify this is what you really want

  16. ……


  17. %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  18.      Error in routine phq_readin (1):
  19.      no elec. field with metals
  20. %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

  21.      stopping ...
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想在此求助对于含金属元素的有机无机杂化体系,应如何计算其红外光谱?谢谢!

gcq#413: "I know poetry is not dead, nor genius lost; nor has Mammon gained power over either, to bind or slay; they will both assert their existence, their presence, their liberty and strength again one day." (Jane Eyre in Jane Eyre by Charlotte Bronte)

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 楼主 Author| 发表于 Post on 2023-2-13 14:21:28 | 只看该作者 Only view this author
自我解答如下:
首先对于金属元素,epsil字段不能设置为.true.,否则出现如上报错。其次设置epsil=.false.后,用ph.x计算声子未得到dielec相关信息及输出的fildyn文件,原因为声子计算没达到收敛阈值。在pw.x计算中提高收敛精度,例如设置conver_thr=1.0d-10,然后在ph.x计算中设置tr2_ph=1.0d-08,则成功完成计算,得到预期信息。
gcq#413: "I know poetry is not dead, nor genius lost; nor has Mammon gained power over either, to bind or slay; they will both assert their existence, their presence, their liberty and strength again one day." (Jane Eyre in Jane Eyre by Charlotte Bronte)

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3#
发表于 Post on 2023-6-28 09:00:34 | 只看该作者 Only view this author
请问楼主现在还从事IR模拟方面的工作吗?有没有兴趣合作课题?

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