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qphll

½ð³æ (ÕýʽдÊÖ)

[ÇóÖú] ÊÕÁ²²âÊÔ,¡¡LaFeO3, ÄÜÁ¿±ä»¯Òì³£

³¢ÊÔÓÃvasp¼ÆËãLaFeO3,¡¡ÔÚÊÕÁ²²âÊÔµÄʱºò·¢ÏÖËæ×ÅencutµÄÔö¼Ó,¡¡×ÜÄÜ·´¶øÉý¸ß.

(1) INCAR½Å±¾

m WAVECAR
for  i in 200 250 300 350 400 450 500 550 600
do
cat > INCAR << !
SYSTEM = LF orthorhombic
ENCUT = $i
ISMEAR = 0 ! Gaussian smearing
SIGMA = 0.1
LREAL= Auto
PREC= Accurate
!
echo  "ENCUT= $i eV" ;
time;
./vasp5211 ;

E=`grep "TOTEN" OUTCAR | tail -1 | awk '{printf "%12.6f \n", $5}'`
echo $i $E >> compare
done

(2) KPOINTS Îļþ

Automatic generation
0
Monhkorst-Pack
4       4       4
0.0     0.0     0.0

(3) POSCAR Îļþ

rthorhombic
1.0
        5.5349998474         0.0000000000         0.0000000000
        0.0000000000         7.8880000114         0.0000000000
        0.0000000000         0.0000000000         5.5989999771
   12    4    4 ! O Fe La
Direct
     0.270900011         0.034699999         0.229399994
     0.729099989         0.965300024         0.770600021
     0.229099989         0.965300024         0.729399979
     0.770900011         0.034699999         0.270600021
     0.729099989         0.534699976         0.770600021
     0.270900011         0.465299994         0.229399994
     0.770900011         0.465299994         0.270600021
     0.229099989         0.534699976         0.729399979
     0.493999988         0.250000000         0.564400017
     0.506000042         0.750000000         0.435599983
     0.006000012         0.750000000         0.064400017
     0.993999958         0.250000000         0.935599983
     0.000000000         0.000000000         0.000000000
     0.500000000         0.000000000         0.500000000
     0.000000000         0.500000000         0.000000000
     0.500000000         0.500000000         0.500000000
     0.518400013         0.250000000         0.008900000
     0.481599987         0.750000000         0.991100013
     0.981599987         0.750000000         0.508899987
     0.018400013         0.250000000         0.491100013

×îºóµÃµ½µÄͼÊÇÕâÑùµÄ:

http://edu.muchong.com/attachment/16/b3/89654_1333900508_628.jpg

ͬÑù, Èç¹ûÐ޸Ľű¾, ¶Ôsigma²âÊÔ, ×îºóµÃµ½µÄͼÖÐÄÜÁ¿ÊÇÏßÐÔµÄ:

SIGMA ½Å±¾

rm WAVECAR
for  i in 0.04 0.06 0.08 0.10 0.12 0.14 0.16 0.18 0.20 0.22 0.24 0.26 0.28 0.30
do
cat > INCAR << !
SYSTEM = LF orthorhombic
ENCUT = 500
ISMEAR = 0 ! Gaussian smearing
SIGMA = $i
LREAL= Auto
PREC= Accurate
ISTART = 0
ICHARGE = 2
!
echo  "SIGMA= $i eV" ;
time;
./vasp5211 ;

E=`grep "EENTRO" OUTCAR | tail -1 | awk '{printf "%12.6f \n", $5}'`
echo $i $E >> sigma.compare
done

sigma²âÊÔÄÜÁ¿Í¼:

http://edu.muchong.com/attachment/87/87/89654_1333900718_282.jpg

ÕâÊÇÔõô»ØÊÂÄØ? ¿ÉÄܵÄÎÊÌâ:
a. INCARÖеIJÎÊýÉèÖÃ??
b.ØÍÊÆµÄÑ¡Ôñ?? PAW-PBEµÄO, La, FeÓм¸¸ö, ÎÒµ¹Ã»ÓнøÐÐÑ¡Ôñ
c. ÏÈÓÅ»¯½á¹¹, ÔÙµ¥µãÄܼÆËã??  POSCARÖ±½Ó´ÓÎÄÏ×±¨µ¼µÄCIFµÃµ½. ÎҵĴòËãÊÇ×öÍê²âÊÔÒÔºó, ÔÙ×ö¾§ÌåµÄ½á¹¹ÓÅ»¯.

´ó¼ÒÓÐʲô½¨Òé?

¶àл.

ENCUT.test



SIGMA.test

[ Last edited by qphll on 2012-4-9 at 01:03 ]
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