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[½»Á÷] Abinit ÖмÆËã PDOS ºÍPJPDOS

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2. Abinit 5.6.3Öеķ½·¨£¬ÎÒÊǸù¾Ý½ñÌìÔÚabinit forumÀï¿´µ½³ÌÐò×÷ÕߵĽ¨ÒéÀ´²Ù×÷µÄ¡£´ó¼Ò¿ÉÒÔÈ¥forum mailing list ¿´¿´
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½ð³æ (СÓÐÃûÆø)

¡ï ¡ï
fegg7502(½ð±Ò+2,VIP+0):thanks
mailing listÖеÄÓʼþÔ­ÎÄ£¬´ó¼Ò¸ù¾ÝÓʼþÀ´¸Äanaddb¾Í¿ÉÒÔÁË
Digging into my files I found an anaddb input that can be used to calculate the PHDOS. The flags that have to be added in the input file are:

ifcflag  1  #IFC's are needed

#DOS related variables
prtdos  1              # 1 for gaussian, 2 for tetrahedrons
ng2qpt  35 35 7        # Dense q-mesh for Fourier interpolation
q2shft  0.0 0.0 0.0      # Shift for the dense mesh
dosdeltae  9.112670E-7  # 0.1 cm-1  frequency step for PHDOS
dosmear    1.366900E-5  # 3 cm-1    broadening (only for Gaussian method)

At the end of the calculation the results are stored in the PHDOS file
There are several columns:

# omega     PHDOS    IPHDOS   PJDOS[1]  IPJDOS[1] ..

PHDOS refers to the total phonon DOS,
IPHDOS is the integrated DOS, then we have the contribution due to all the atoms of the first type as well as the corresponding integrated dos.

3 Comments:
1) To call mkphdos you have to modify a bit 17ddb/invars9
  commenting out the call to leave_new in the following piece of code

if(anaddb_dtset%prtdos/=0 .and. anaddb_dtset%ifcflag/=1) then
  write(message, '(5a)' )&
&  ' invars9 : ERROR -',ch10,&
&  '  ifcflag must be 1 when the calculation of the phonon DOS is required',ch10,&
&  '  Action : correct ifcflag in your input file.'
  call wrtout(6,message,'COLL')
  call leave_new('COLL')
end if
2) If I remember well in old versions of abinit there's a small bug (just
a missing factor)
   in the calculation of the integrated type-projected PHDOS. So don't
rely on the columns
   reporting the type-projected IPHDOS. If you need, you can easily
integrate the curve using
   a plotting software such as xmgrace.

3) Be careful when using the tetrahedron method. The CPU time doesn't
scale well wrt
   to the number of Fourier interpolated q-points. This is a general
problem I found also
   in case of electronic DOS calculations. One should do some serious
profiling of the tetrahedron
   routines and the fortran loops to individuate the bottleneck
2Â¥2008-12-04 14:13:07
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watermall

½ð³æ (СÓÐÃûÆø)

¡ï ¡ï ¡ï ¡ï
fegg7502(½ð±Ò+2,VIP+0):thanks
fegg7502(½ð±Ò+2,VIP+0):thanks
ÓÐÓÃabinit5.6.3windows°æ±¾µÄ£¬¿ÉÒÔÏÂÔØ¸½¼þÖÐÖØÐ±àÒëµÄanaddb
3Â¥2008-12-04 14:17:20
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4Â¥2008-12-04 18:13:54
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zxzj05

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BigBlackBear

Òø³æ (СÓÐÃûÆø)

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6Â¥2008-12-05 08:57:51
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zxzj05

ÈÙÓþ°æÖ÷ (ÖøÃûдÊÖ)

¡ï ¡ï ¡ï
fegg7502(½ð±Ò+3,VIP+0):thanks
Atom-projected contributions are not directly available because the different contributions arising from atoms of the same type are summed up. Anyway calculating atom-projected contributions is just a matter of changing a bit the routine (17ddb/mkphdos.F90).


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7Â¥2008-12-09 15:29:43
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zxzj05

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fegg7502(½ð±Ò+1,VIP+0):¹ÄÀøÌÖÂÛ
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8Â¥2008-12-10 17:25:00
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¡ï ¡ï ¡ï
zdhlover(½ð±Ò+3,VIP+0):¶àл£¬»¶Ó­³£À´°¡
ÒýÓûØÌû:
Originally posted by zxzj05 at 2008-12-10 17:27:
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