²é¿´: 1338  |  »Ø¸´: 2

snowmami

гæ (ÕýʽдÊÖ)


[½»Á÷] ¡¾ÇóÖú¡¿wien2k-FAQʵÔÚÊÇ¿´²»¶®£¬ÄÄλ¸ßÊÖ°ïÎÒ·­ÒëÏ£¿

ÏÂÃæµÄÎÄ×Ö¶ÔÎÒºÜÖØÒª£¬µ«ÊµÔÚ¿´²»¶®£¬ºÜ׿±£¬ÄÑÕß²»»á£¬»áÕß²»ÄÑ£¬¸÷λ¸ßÊÖÄÜ·ñ°ïæ·­ÒëÏ£¿
WIEN2k-FAQ: Setup of antiferromagnetic calculations?

©2001 by P. Blaha, K. Schwarz and J. Luitz

Back to:

      FAQ Index

Setup of antiferromagnetic calculations requires some tricks which will be described below:

   1. You need to construct a unit cell which allows for the desired AF ordering. E.g. for bcc Cr you have to put "P" lattice and 2 NON-equivalent atoms at (0,0,0) and (0.5,0.5,0.5). In order to make nn working properly, you should also specify different labels in the "name(3:10)"-field for the two AF-atoms (Eg. "Cr1" and "Cr2".
   2. Run init_lapw. nn and/or sgroup determines equivalent atoms. Accept eventually the new struct_nn file (You may have to use the same procedure as described in faq:supercells).
   3. Edit case.inst and flip the spin of the second AF atom. This means you must invert the spin-up and dn occupation of this atom. Atoms which carry no spin (e.g. an O between two AF metal atoms) should be made non-spinpolarized by setting equal numbers of up and dn-electrons.
      For AFM NiO case.inst looks like:

      Ni
      Ar 3 5
      3, 2,2.0  N
      3, 2,2.0  N
      3,-3,3.0  N
      3,-3,1.0  N
      4,-1,1.0  N
      4,-1,1.0  N
      Ni
      Ar 3 5
      3, 2,2.0  N
      3, 2,2.0  N
      3,-3,1.0  N   <=== spin flipped
      3,-3,3.0  N   <=== spin flipped
      4,-1,1.0  N
      4,-1,1.0  N
      O
      He 3 5
      2,-1,1.0  N
      2,-1,1.0  N
      2, 1,1.0  N
      2, 1,1.0  N
      2,-2,1.0  N  <=== equal occup for up/dn
      2,-2,1.0  N  <=== equal occup for up/dn
      ****     End of Input
      ****     End of Input

      This case.inst file can also be prepared by the new: instgen_lapw -ask , where you can specify for each atom spin-up, dn or non-magnetic configurations.
   4. Continue with init_lapw (rerunning lstart) and select "spin-polarized" calculations.
   5. You may now run an scf cycle using runsp_lapw; or
   6. You may try to select "AFM-calculations", generate "case.inclmcopy" and use "runafm_lapw". For simplest use of "afminput" you should provide the nonmagnetic (or ferromagnetic) supergroup in "case.struct_supergroup". Please read the usersguide for more details. (help_lapw and search for AFM).

      If you succeed to generate proper input files, you can do the scf-cycle by "runafm_lapw", which will save at least half the computer time, since only one spin-direction is calculated and the other one is generated by symmetry. However, since these programs are little tested, I recommend to check the final results of "runafm_lapw" by
   7. "runsp_lapw". If the charge distance (grep IS case.scf) remains small and the magnetic moments do not change, runafm_lapw was successful, otherwise continue with runsp_lapw until convergence.

      Peter Blaha,

[ Last edited by snowmami on 2010-12-8 at 21:59 ]
»Ø¸´´ËÂ¥

» ÊÕ¼±¾ÌûµÄÌÔÌûר¼­ÍƼö

wien2k³£¼ûÎÊÌ⼯½õ wien2k´óÔÓ»â

» ²ÂÄãϲ»¶

» ±¾Ö÷ÌâÏà¹Ø¼ÛÖµÌùÍÆ¼ö£¬¶ÔÄúͬÑùÓаïÖú:

» ÇÀ½ð±ÒÀ²£¡»ØÌû¾Í¿ÉÒԵõ½:

²é¿´È«²¿É¢½ðÌù

ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû
¡ï ¡ï ¡ï
sunyang1988(½ð±Ò+3):ÐÁ¿àÁË 2010-12-11 19:23:30
½øÐз´Ìú´Å¼ÆËãµÄ²½Ö裺
1¡¢´´½¨Ò»¸öAFÐèÒªµÄµ¥°û¡£ÀýÈ磺¶ÔÓÚÌåÐÄCr£¬Ó¦¸Ãѡȡ¾§¸ñ¶Ô³ÆÐÔP£¨È¡Ïû¶Ô³ÆÐÔ£©£¬2¸ö²»µÈ¼ÛÔ­×ÓλÖÃ(0,0,0)ºÍ(0.5,0.5,0.5).ΪÁËʹnnѡȡºÏÊÊ£¬Ó¦¸Ã¸øÁ½¸öAFÔ­×Ó²»Í¬µÄ±ê¼Ç£¨ÀýÈ磺Cr1£¦Cr2£©
2¡¢ÔËÐÐinit_lapw¡£nn»òÕßsgroupÐèÒªµÈ¼ÛÔ­×Ó£¬½ÓÊÜнṹÎļþstruct_nn
3¡¢±à¼­case.inst²¢ÇÒ·­×ªµÚ¶þ¸öAFÔ­×Ó×ÔÐý¡£ÕâÒâζ×Å·­×ªÕâ¸öÔ­×ÓÕ¼¾Ý̬µÄÉÏÏÂ×ÔÐý¡£¶ÔÓÚ²»´ø×ÔÐýµÄÔ­×Ó£¨ÀýÈçOÔ­×Ó£©£¬Ó¦¸ÃʹÓ÷Ç×ÔÐý¼«»¯£¨ÉÏÏÂ×ÔÐýµç×ÓÊýÏàµÈ£©¡£
¶ÔÓÚAFMµÄNIO µÄcase,instΪ£ºÂÔ
£ª£ª£ªÕâ¸öcase.instÎļþÒ²¿ÉÒÔÓÃinstgen_lapw -askÃüÁî²úÉú£¬Õâ¸öÃüÁî¿ÉÒÔ±ê¼ÇÈκÎÔ­×ÓΪÉÏ×ÔÐý£¬ÏÂ×ÔÐý£¬»òÕß·Ç´Å¡££¨ÎÒÔÚ¼ÆËãAFMʱ¶¼ÊÇʹÓÃÕâ¸öÃüÁ
4¡¢¼ÌÐøinit_lapw²¢ÇÒÑ¡Ôñ×ÔÐý¼«»¯¼ÆË㣬Íê³É³õʼ»¯¡£
5¡¢³õʼ»¯Íê³ÉºóÔËÐÐrunsp_lapw»òÕß½øÐеÚ6²Ù×÷
6¡¢Ñ¡ÔñAFM-calculations£¬Éú³Écase.inclmcopyÎļþ£¬Ê¹ÓÃrunafm_lapw¡£¶ÔÓÚafminput×î¼òµ¥µÄʹÓã¬ÄãÓ¦¸ÃÓÃcase.struct_supergroupÌṩ·Ç´Å»òÌú´Åsupergroup¡£ÏêϸÔĶÁuserguide£¨help_lapw and search for AFM£©
³É¹¦Éú³ÉÊäÈëÎļþºó£¬¿ÉÒÔÔËÐÐ×Ôǡѭ»·Í¨¹ýrunafm_lapw¡£ÒòΪֻ¼ÆËãÉÏ×ÔÐý£¬ÆäËû×ÔÐý·½ÏòµÄ¼ÆËã¶¼ÊÇͨ¹ý¶Ô³ÆÐÔÍê³ÉµÄ£¬ËùÒÔ¿ÉÒÔ¼õÉÙÒ»°ãµÄ¼ÆËãʱ¼ä¡£
7¡¢Èç¹ûcharge distance ÈÔÈ»ºÜС£¬´Å¾ØÃ»Óиı䣬ÔËÐÐrunsp_lapw£¬ÔÙrunafm_lapw¡£Èç¹û»¹²»³É¹¦¼ÌÐørunsp_lapwÖ±µ½ÊÕÁ²¡£
2Â¥2010-12-11 19:15:56
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

snowmami

гæ (ÕýʽдÊÖ)


ÒýÓûØÌû:
Originally posted by gzqdyouxia at 2010-12-11 19:15:56:
½øÐз´Ìú´Å¼ÆËãµÄ²½Ö裺
1¡¢´´½¨Ò»¸öAFÐèÒªµÄµ¥°û¡£ÀýÈ磺¶ÔÓÚÌåÐÄCr£¬Ó¦¸Ãѡȡ¾§¸ñ¶Ô³ÆÐÔP£¨È¡Ïû¶Ô³ÆÐÔ£©£¬2¸ö²»µÈ¼ÛÔ­×ÓλÖÃ(0,0,0)ºÍ(0.5,0.5,0.5).ΪÁËʹnnѡȡºÏÊÊ£¬Ó¦¸Ã¸øÁ½¸öAFÔ­×Ó²»Í¬µÄ±ê¼Ç£¨ÀýÈ磺Cr1 ...

Ò²ÐíÊÇÎÒÌ«±¿Á˵㣬»¹ÊDz»¶®°¡£¡
ÄúÄÜ·ñ½áºÏZnOµÄ2*2*2³¬°ûÖÐÒ»¸öZnÔ­×Ó±»NiÔ­×ÓÈ¡´úÕâ¸öÌåϵ£¬¾ßÌå˵һ˵ÈçºÎ½øÐÐAFMµÄ¼ÆËãÄØ£¿ÌرðÊÇÄǸö×Ô¶¯Éú³É*.instµÄÃüÁÖîÈç´ËÀàµÄÃüÁîÈ¥ÄÄÀï²éÕÒ£¿¼ÆËã̬ÃܶÈʱÐèÒª±à¼­*.int ÎļþÊÇ·ñÒ²ÓÐÕâôºÃÓõÄÃüÁîÄØ£¿ºÇºÇ£¬I'm only a layman on WIEN2k,please tell me in detail. Thank you very much!
3Â¥2010-12-12 14:26:05
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû
Ïà¹Ø°æ¿éÌø×ª ÎÒÒª¶©ÔÄÂ¥Ö÷ snowmami µÄÖ÷Ìâ¸üÐÂ
×î¾ßÈËÆøÈÈÌûÍÆ¼ö [²é¿´È«²¿] ×÷Õß »Ø/¿´ ×îºó·¢±í
[¿¼ÑÐ] 268Çóµ÷¼Á +8 Ò»¶¨ÓÐѧÉÏ- 2026-03-14 9/450 2026-03-17 17:47 by laoshidan
[¿¼ÑÐ] ²ÄÁϹ¤³Ìר˶µ÷¼Á +5 204818@lcx 2026-03-17 5/250 2026-03-17 17:27 by Little-xue
[¿¼ÑÐ] 085600²ÄÁÏÓ뻯¹¤ +4 °²È«Éϰ¶£¡ 2026-03-16 4/200 2026-03-17 14:02 by Ó¸ÒÌ«¼àÍõ¹«¹«
[ÂÛÎÄͶ¸å] ÓÐûÓдóÀз¢Ð¡ÂÛÎÄÄÜ´øÎÒ¸ö¶þ×÷ +3 ÔöÈñ©ÈË 2026-03-17 4/200 2026-03-17 09:26 by xs74101122
[¿¼ÑÐ] 333Çóµ÷¼Á +3 ÎÄ˼¿Í 2026-03-16 7/350 2026-03-16 18:21 by ÎÄ˼¿Í
[¿¼ÑÐ] 0703»¯Ñ§µ÷¼Á +6 ÄÝÄÝninicgb 2026-03-15 9/450 2026-03-16 16:40 by houyaoxu
[¿¼ÑÐ] ÖпÆÔº²ÄÁÏ273Çóµ÷¼Á +4 yzydy 2026-03-15 4/200 2026-03-16 15:59 by Gaodh_82
[¿¼ÑÐ] 0703 ÎïÀí»¯Ñ§µ÷¼Á +3 ÎÒ¿ÉÒÔÉϰ¶µÄ¶Ô 2026-03-13 5/250 2026-03-16 10:50 by ÎÒ¿ÉÒÔÉϰ¶µÄ¶ÔÂ
[¿¼ÑÐ] 0703»¯Ñ§µ÷¼Á 290·ÖÓпÆÑо­Àú£¬ÂÛÎÄÔÚͶ +7 ÄåÄågk 2026-03-14 7/350 2026-03-16 10:12 by houyaoxu
[¿¼ÑÐ] 0856Çóµ÷¼Á +3 ÁõÃÎ΢ 2026-03-15 3/150 2026-03-16 10:00 by houyaoxu
[¿¼ÑÐ] 22408×Ü·Ö284Çóµ÷¼Á +3 InAspic 2026-03-13 3/150 2026-03-15 11:10 by zhq0425
[¿¼ÑÐ] 085601²ÄÁϹ¤³Ì315·ÖÇóµ÷¼Á +3 yang_0104 2026-03-15 3/150 2026-03-15 10:58 by peike
[¿¼ÑÐ] 080500£¬²ÄÁÏѧ˶302·ÖÇóµ÷¼ÁѧУ +4 ³õʶ¿ÉÀÖ 2026-03-14 5/250 2026-03-14 21:08 by peike
[¿¼ÑÐ] ±¾¿ÆÄϾ©´óѧһ־Ը´¨´óҩѧ327 +3 ÂóÌï¸ûÕß 2026-03-14 3/150 2026-03-14 20:04 by ÍâÐÇÎÄÃ÷
[¿¼ÑÐ] 265Çóµ÷¼Á +4 Íþ»¯±ý07 2026-03-12 4/200 2026-03-14 17:23 by userper
[¿¼ÑÐ] Çóµ÷¼Á£¨²ÄÁÏÓ뻯¹¤327£© +4 °®³ÔÏã²ËÀ² 2026-03-11 4/200 2026-03-13 22:11 by JourneyLucky
[¿¼ÑÐ] Çóµ÷¼Á +5 Ò»¶¨ÓÐѧÉÏ- 2026-03-12 5/250 2026-03-13 18:31 by ms629
[¿¼ÑÐ] Çóµ÷¼Á +3 ³ÌÓ꺼 2026-03-12 3/150 2026-03-13 15:06 by JourneyLucky
[¿¼ÑÐ] 328»¯¹¤×¨Ë¶Çóµ÷¼Á +4 ¡££¬¡££¬¡££¬¡£i 2026-03-12 4/200 2026-03-13 14:44 by JourneyLucky
[¿¼ÑÐ] 289Çóµ÷¼Á +3 ÀîÕþÓ¨ 2026-03-12 3/150 2026-03-13 11:02 by Çóµ÷¼Ázz
ÐÅÏ¢Ìáʾ
ÇëÌî´¦ÀíÒâ¼û