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[×ÊÔ´] ¡¾×ªÌû¡¿Ç¿ÁÒÍÆ¼öʹÓÃphonopy¼ÆËãÉù×ÓÆ× ÒÑÓÐ2È˲ÎÓë

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1. Phonopy ¼ò½é
Phonopy ÊÇÒ»¸öÓÉ python ʵÏֵĵľ§ÌåÉù×Ó·ÖÎö³ÌÐò¡£ËüÊÇĿǰÌṩÁË VASP µÄ Wien2k µÄ½Ó¿ÚÓÃÀ´¼ÆËãÔ­×ÓÊÜÁ¦¡£ËüµÄÖ÷Òª¹¦ÄÜÓУº

¼ÆËãÉù×ÓɫɢÆ×£»
¼ÆËãÉù×Ó̬Ãܶȣ¬°üÀ¨·ÖÁ¢Ì¬Ãܶȣ»
Éù×ÓÈÈÁ¦Ñ§ÐÔÖÊ£¬°üÀ¨×ÔÓÉÄÜ£¬ÈÈÈÝÁ¿£¬ìÊ£»

Phonopy ͨ¹ýÁ¦³£ÊýµÄ·½·¨¼ÆËãÉù×ӯס£Á¦³£ÊýÓɼÆËãÔ­×ÓÔÚ³¬¾§°ûÖб»Òƶ¯ºóµÄÊÜÁ¦µÃµ½(Parlinsk-Li-Kawasoe ·½·¨)¡£

ͬÑùÀàÐ͵ijÌÐò»¹ÓÐ phon, fropho, phonon. ÆäÖÐ phonon ÊÇÉÌÒµÈí¼þ£¬ÂôµÄºÜ¹ó£¬fropho ºÍ phonopy µÄ´úÂëÆäʵ¶¼ÊÇÀ´×ÔÓÚ phon, fropho ÊÇΪÁË´úÌæ phon ¶ø¿ª·¢µÄ£¬Ä¿µÄÊÇΪÁËʹÓà phon ¸ü·½±ã£¬phon ºÍ fropho Ö÷Òª¶¼ÊÇÓÉ fortran ¿ª·¢µÄ£¬¶øÏÖÔÚ fropho ÒѾ­Í£Ö¹¿ª·¢£¬ÓÉ python ¿ª·¢µÄ phonopy ´úÌæÁË fropho, phonopy ÔÚʹÓÃÉϸüΪ·½±ã£¬ÔÚ¼ÆËãÁ¿ÉϸüΪ¼õÉÙ¡£ÒòΪ phon, fropho ºÍ phonon ÔÚÒÆ¶¯Ô­×ÓλÖÃʱ¶¼ÊÇÒ»´ÎÖ»ÒÆ¶¯Ò»¸öÔ­×ÓµÄÒ»¸ö·½Ïò£¬¶ø phonopy Ôò¿ÉÒÔÒ»´ÎÒÆ¶¯Ò»¸öÔ­×ӵĶà¸ö·½Ïò£¬ËùÒÔºÍÆäËü³ÌÐòÏà±È, phonopy ×î¶à¿ÉÒÔ¼õÉÙ 2/3 µÄ¼ÆËãÁ¿¡£

2. Phonopy µÄ°²×°
phonopy Ö÷ÒªÓÉ python ¿ª·¢£¬ÆäÖеÄÕÒ¾§Ìå¿Õ¼äȺ¹¦ÄÜÊÇÓÉ C ÓïÑÔ(spglib)ʵÏÖ¡£ÔÚ°²×° phonopy ʱÐèÒª°²×°ÒÔÏÂËüËùÒÀÀµµÄÈí¼þ°ü£º

Python µÄ¿ª·¢°ü
numpy , numpy-dev
matplotlib
python-lxml
python-yaml

Èç¹ûÊÇʹÓÃµÄ Ubuntu/Debian ϵͳֻÐ裺
sudo aptitude install python-dev python-numpy \
python-matplotlib python-tk python-lxml python-yaml

Èç¹ûÊÇ OpenSUSE Ôò¿ÉÒÔÈ¥ http://software.opensuse.org/search ËÑË÷ÏÂÔØ°²×°Ïà¹ØÈí¼þ°ü¡£

È¥ https://sourceforge.net/projects/phonopy/ ÏÂÔØ phonopy µÄ×îÐÂÈí¼þ°ü.

½âѹºó½øÈë Èí¼þ°üµÄ c Ŀ¼£¬

su
python setup.py install

±àÒë°²×°ËùÐèÒªµÄ python Ä£¿é¡£

½« PATH/phonopy-0.6.1 $PATH À
±ÈÈ磺 export PATH=~/opt/phonopy-0.6.1:$PATH

3. Phonopy µÄ¼òµ¥Ê¹ÓÃ
ÏÂÃæÎÒÒÔ BC5 ΪÀý˵Ã÷ÈçºÎºÍ VASP ×ö½Ó¿Ú¼ÆËãÉù×ӯףº

a, ½¨Á¢³¬°û
×¼±¸ POSCAR Îļþ
µ¥°ûºÍÔ­°û¶¼¿ÉÒÔ

×¼±¸ INPHON Îļþ

ATOM_NAME = B C
NDIM = 2 2 1
LSUPER = .TRUE.

¼òµ¥ËµÃ÷£º
µÚÒ»ÐÐΪԭ×Ó·ûºÅÃû B C £¬×¢ÒâÒªºÍ POSCAR ÖеÄ˳ÐòÏàͬ¡£
µÚ¶þÐÐΪҪ½¨µÄ³¬°ûµÄάÊý¡£
µÚÈýÐÐÊÇÖ¸Òª½¨Á¢Òƶ¯Ô­× POSCAR.

È»ºóÊäÈëÃüÁ
phonopy.py

¾Í»áÊä³ö DISP, POSCAR-* (001, 002, 003, ¡­)
ÔÚ±¾Àý³ö»áÊä³ö 12 ¸ö POSCAR-*, ÒÀ´ÎΪ POSCAR-001,¡­POSCAR-012

b, ¼ÆËãÁ¦³£Êý
½«ÕâЩ POSCAR-* ×ö SCF, ½«Êä³öÎļþ vasprun.xml ±£´æÏÂÀ´¡£
ÎҵļÆËã½Å±¾Îª£º

#!/bin/sh

for a in 01 02 03 04 05 06 07 08 09 10 11 12
do
cp POSCAR-0$a POSCAR
/opt/intel/impi/3.1/bin64/mpiexec -n 8 /share/apps/vasp/bin/vaspmpi_mkl10_O1 >>out.vasp 2>>err.vasp &
wait
cp vasprun.xml vasprun.xml-0$a
done

ÎÒµÄ INCAR Ϊ£º

SYSTEM = BC5
PREC = Accurate
ENCUT = 520
EDIFF = 1e-5
NSW = 0
ISMEAR = 0
SIGMA = 0.05
LCHARG = FALSE
LWAVE = FALSE

ÕâÑù¼ÆËã½áÊøºó»áµÃµ½ vasprun.xml-001, ¡­, vasprun.xml-012

È»ºó£¬Ö´ÐÐÃüÁ
phonopy.py -f vasprun.xml-*

¾Í»áµÃµ½Îļþ FORCES

c, µÃµ½Éù×ÓÆ×
ÓÐÁËÎļþ FORCES ºó¾Í¿ÉÒÔ¼ÆËãÉù×ÓÆ×ÁË£¬Õâʱ½« INPHON ¸ÄΪÒÔÏÂÄÚÈÝ£º

ATOM_NAME = B C
NDIM = 2 2 1
ND = 7
NPOINTS = 51
QI = 0.0 0.0 0.5 0.0 0.5 0.5 0.0 0.5 0.0 0.0 0.0 0.0 0.5 0.5 0.0 0.5 0.0 0.0 0.5 0.0 0.5
QF = 0.0 0.5 0.5 0.0 0.5 0.0 0.0 0.0 0.0 0.5 0.5 0.0 0.5 0.0 0.0 0.5 0.0 0.5 0.5 0.5 0.5

¼òµ¥ËµÃ÷£º
ND ÊÇÖ¸Óм¸Ìõ·¾¶£»
NPOINTS ÊÇÖ¸ÔÚÿÁ½¸ö¸ß¶Ô³ÆÐÔµã¼ä²åÈë¶àÉÙ¸öµã£¬°üÀ¨±ß½ç£»
QI ºÍ QF ¸ø³ö·¾¶µÄÆðʼºÍ½áÊøµã¡£

ÆäÖÐÎÒÓÃµÄ Q µã˳ÐòΪ£º
0.0 0.0 0.5 Z
0.0 0.5 0.5 T
0.0 0.5 0.0 Y
0.0 0.0 0.0 G
0.5 0.5 0.0 S
0.5 0.0 0.0 X
0.5 0.0 0.5 U
0.5 0.5 0.5 R

Ö´ÐÐ ÃüÁî
phonopy.py -p

¼´¿É»­³öÉù×ӯף¬ Èç¹ûÖ´ÐÐ phonopy.py -p -s ¼´¿É½«Éù×ÓÆ×ÇúÏß±£´æÎª PDF Îļþ¡£
ÆäÖÐ Éù×ӯ׵ÄÊý¾ÝÊÇÒÔ yaml ¸ñʽ±£´æÔÚ band.yaml ÀïµÄ¡£

Èç¹ûÄãÏëÓà Origin, Qtiplot, Xmgrace µÈ¹¤¾ß»­Í¼µÄ»°£¬¿ÉÒÔÓÃÎÒдµÄ python ½Å±¾£¬readband.py (http://www.zhuli.name/file/readband.py) ½« band.yaml ת»»Ò»Ï£¬Êä³öÎļþÓÐÁ½¸ö band.dat, qpoint.dat.
ÆäÖÐ band.dat ÊÇÉù×ÓÆ×Êý¾Ý£¬ qpoint.dat ÊǸ߶ԳÆÐÔµãµÄÊý¾Ý¡£

ÒÔÉÏÖ»ÊÇ phonopy µÄÆä±¾Ó÷¨£¬Èç¹ûÒª¼ÆËãÉù×Ó̬¶È¶ÈºÍÈÈÁ¦Ñ§ÐÔÖʵϰ¿ÉÒԲο¼
http://phonopy.sourceforge.net ÉϵÄÎĵµ£¬»¹ÊDZȽϼòµ¥µÄ¡£

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VASP µÚÒ»ÐÔÔ­Àí¼ÆËã-tg µÚÒ»ÐÔÔ­Àí¼ÆËã¾­Ñé µÚÒ»ÐÔÔ­Àí¼ÆË㸨Öú¹¤¾ß
µÚÒ»ÐÔÔ­ÀíÔÓ @¸öÈËÊÕ¼¯@ ÓÐЧÖÊÁ¿ ÄÉÃ×¼°µÚÒ»ÐÔÔ­Àí·½Ïò
µÚÒ»ÐÔ ¼ÆË㻯ѧ-¸¨Öú¹¤¾ß VASP VASPѧϰ
soft study siesta & vasp Ä£Äâ¼ÆËã¿ÎÌâµÄѧϰ

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