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[×ÊÔ´] ¡¾×ªÌû¡¿ÈçºÎÓÃVASP¼ÆËã¾§¸ñ³£Êý

·ÖÏí] ÈçºÎÓÃVASP¼ÆËã¾§¸ñ³£Êý
ÎÒÃÇÓÃPd½ðÊô×÷ΪÀý×Ó¡£
  Pd½ðÊôµÄʵÑéÉϵľ§¸ñ³£ÊýΪ3.89A¡£ÔÚÕâÀÎÒÃÇÓÃVASP¼ÆËãËüµÄ¾§¸ñ³£Êý¡£
  Ê×ÏȽ«PdËù¶ÔÓ¦µÄPOTCARÎļþ¿½±´µ½Ä¿Â¼Ï¡£È»ºó×¼±¸ºÃINCARºÍKPOINTSÎļþ¡£POSCARÎļþÎÒÃǽ«Í¨¹ýÒ»¸ötcshµÄscriptÀ´²úÉú¡£

  KPOINTSÎļþ¿ÉÒÔÈçÏ£º
  Monkhorst Pack
  0
  Monkhorst Pack
   11 11 11
   0 0 0

  INCARÎļþ¿ÉÒÔÈçÏ£º
   SYSTEM = Pd bulk calculation
   Startparameter for this run:
   PREC = Accurate
   ISTART = 0 job : 0-new 1-cont 2-samecut
   ICHARG = 2 charge: 1-file 2-atom 10-const
   ISPIN = 1 spin polarized calculation?

   Electronic Relaxation 1
   EDIFF = 0.1E-03 stopping-criterion for ELM
   LREAL = .FALSE. real-space projection
   Ionic relaxation
   EDIFFG = 0.1E-02 stopping-criterion for IOM
   NSW = 0 number of steps for IOM
   IBRION = 2 ionic relax: 0-MD 1-quasi-New 2-CG
   ISIF = 2 stress and relaxation

   POTIM = 0.10 time-step for ionic-motion
   TEIN = 0.0 initial temperature
   TEBEG = 0.0; TEEND = 0.0 temperature during run

   DOS related values:
   ISMEAR = 0 ; SIGMA = 0.05 gaussian smear

   Electronic relaxation 2 (details)

   Write flags
   LWAVE = F write WAVECAR
   LCHARG = F write CHGCAR

  
  ²úÉúPOSCARºÍ¼ÆËã¾§¸ñ³£ÊýµÄ¹¤×÷¿ÉÒÔÓÃÒÔϵÄPBS scriptÀ´Íê³É¡£
  #!/bin/tcsh
  #PBS -S /bin/sh
  #PBS -l nodes=4:athlon:ppn=2
  #PBS -l cput=384:00:00
  #PBS -m ae
  #PBS -o output
  #PBS -e error.log

  # set parameter
  set EXEC = 'vasp'
  set SRC = '/usr/common/executable'

  # change working directory
  cd $PBS_O_WORKDIR

  # copy fresh executable from depository
  cp -f $SRC/$EXEC .

  # execute mpi program
  foreach a (3.3 3.4 3.5 3.6 3.7)
  echo "a= $a"

  cat >POSCAR <   cubic diamond
   $a
   0.5 0.5 0.0
   0.0 0.5 0.5
   0.5 0.0 0.5
   2
  direct
   0.0 0.0 0.0
   0.25 0.25 0.25
  !

  mpiexec -nostdin ./$EXEC

  set E=`tail -2 OSZICAR`
  echo $a $E >>SUMMARY

  end
  # remove executable
  rm -f $EXEC

  Èç¹û²»Óò»ÐèÒªÓÃPBS script£¬Ôò¸ü¼Ó¼òµ¥£¬Èçϼ´¿É¡£½«ÆäÃüÃûΪlattice¡£
  #!/bin/tcsh
  foreach a (3.5 3.6 3.7 3.8 3.9 4.0 4.1 4.2)
  echo "a= $a"

  cat >POSCAR <   fcc lattice
   $a
   0.5 0.5 0.0
   0.0 0.5 0.5
   0.5 0.0 0.5
   1
  cartesian
   0.0 0.0 0.0
  !

  ./vasp

  set E=`tail -1 OSZICAR`
  echo $a $E >>SUMMARY

  end

  ÓÃchmod +x lattice£¬½«Æä¸ÄΪ¿ÉÖ´ÐÐÎļþ¡£È»ºóÔÚÃüÁîÐÐÀï¼üÈë./lattice ¼´¿É¡£

  
  ÒÔÏÂÊÇÓÃUSPP-LDAÔËÐÐÍêºóµÄSUMMARYÎļþ¡£Ã¿¸ö¼ÆËãÓÃʱ13Ãë¡£ £¨ÔÚUSPPÖÐPdµÄ½Ø¶ÏÄÜÁ¿ÊÇ198.955£©
  3.5 1 F= -.52384500E+01 E0= -.52371846E+01 d E =-.253072E-02
  3.6 1 F= -.58695670E+01 E0= -.58683951E+01 d E =-.234381E-02
  3.7 1 F= -.62322232E+01 E0= -.62311104E+01 d E =-.222547E-02
  3.8 1 F= -.63932936E+01 E0= -.63921078E+01 d E =-.237151E-02
  3.9 1 F= -.64072233E+01 E0= -.64058584E+01 d E =-.272979E-02
  4.0 1 F= -.63162916E+01 E0= -.63147061E+01 d E =-.317085E-02
  4.1 1 F= -.61523489E+01 E0= -.61504748E+01 d E =-.374817E-02
  4.2 1 F= -.59418370E+01 E0= -.59396594E+01 d E =-.435530E-02
  ÓÃÅ×ÎïÏßÄâºÍµÃµ½µÄ¾§¸ñ³£ÊýΪ$3.888\AA$,¹ÌÌåÖÐÿ¸öÔ­×ÓµÄÄÜÁ¿ÊÇ$E_{bulk}=-6.4257$¡£

  
  ÒÔÏÂÊDzÉÓÃPAW-LDAÊÆÔËÐÐÍêÒÔºóµÄSUMMARYÎļþ¡£Ã¿¸ö¼ÆËãÓÃʱ20Ãë¡£ËùÒÔÏà¶ÔÀ´ËµPAWÊÆËùÐèÒªµÄʱ¼ä¶àһЩ£¬ÕâÊÇÒòΪPAWÊÆµÄenergy cutoffÏà¶Ô±È½Ï¸ß£¨ÔÚPAWÖÐPdµÄ½Ø¶ÏÄÜÁ¿ÊÇ250.832£©¡£
  3.5 1 F= -.52393107E+01 E0= -.52377274E+01 d E =-.316665E-02
  3.6 1 F= -.58814938E+01 E0= -.58798653E+01 d E =-.325695E-02
  3.7 1 F= -.62451262E+01 E0= -.62437004E+01 d E =-.285149E-02
  3.8 1 F= -.64049388E+01 E0= -.64036223E+01 d E =-.263317E-02
  3.9 1 F= -.64158100E+01 E0= -.64143798E+01 d E =-.286044E-02
  4.0 1 F= -.63210060E+01 E0= -.63194198E+01 d E =-.317251E-02
  4.1 1 F= -.61536329E+01 E0= -.61518107E+01 d E =-.364433E-02
  4.2 1 F= -.59385695E+01 E0= -.59364165E+01 d E =-.430601E-02
  ÓÃÅ×ÎïÏßÄâºÍµÃµ½µÄ¾§¸ñ³£ÊýΪ$3.875\AA$,¹ÌÌåÖÐÿ¸öÔ­×ÓµÄÄÜÁ¿E_bulk=-6.4185eV

  
  ¿É¼û£¬PAW-LDAºÍUSPP-LDA¸ø³öµÄ¾§¸ñ³£Êý¶¼ºÍʵÑéÎǺϵķdz£ºÃ£¬Á½ÕßÖ®¼äµÄ²î±ðÒ²ºÜС¡£ÔÚÒÔÏÂËùÓеļÆËãÖУ¬Èç¹ûûÓÐÌØÊâÉùÃ÷£¬ÎÒÃǶ¼Ä¬ÈϲÉÓÃPAW-LDAµÄÊÆ¡£
  ½áºÏÄÜ(cohesive energy)µÄ¶¨ÒåÈçÏ£º
  -E_coh = [E_bulk-N*E_atom]/N

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