24小时热门版块排行榜    

CyRhmU.jpeg
南方科技大学公共卫生及应急管理学院2026级博士研究生招生报考通知(长期有效)
查看: 4803  |  回复: 32
当前只显示满足指定条件的回帖,点击这里查看本话题的所有回帖

lu_wei07

银虫 (小有名气)

[求助] VASP 设置IBRION=8 没有力常数输出已有4人参与

我想用vasp+phonopy(DFPT)方法算石墨烯声子谱,
INCAR:
PREC = Accurate
ENCUT = 500
IBRION = 8
EDIFF = 1.0e-08
IALGO = 38
ISMEAR = 0
SIGMA = 0.1
LREAL = .FALSE.
ADDGRID = .TRUE.
LWAVE = .FALSE.
LCHARG = .FALSE.
石墨烯的大小用4*4的超胞
POSCAR:
C
   1.0
     9.7879067589373285    0.0000000000000000    0.0000000000000000
     4.8939533794686643    8.4777409580282086    0.0000000000000000
     0.0000000000000000    0.0000000000000000   14.9834834109284358
  32
Direct
  0.0000126345020488  0.9999747309959024  0.0000000000000000
  0.2500126345020488  0.9999747309959024  0.0000000000000000
  0.5000126345020488  0.9999747309959024  0.0000000000000000
  0.7500126345020488  0.9999747309959024  0.0000000000000000
  0.0000126345020488  0.2499747309959024  0.0000000000000000
  0.2500126345020488  0.2499747309959024  0.0000000000000000
  0.5000126345020488  0.2499747309959024  0.0000000000000000
  0.7500126345020488  0.2499747309959024  0.0000000000000000
  0.0000126345020488  0.4999747309959024  0.0000000000000000
  0.2500126345020488  0.4999747309959024  0.0000000000000000
  0.5000126345020488  0.4999747309959024  0.0000000000000000
  0.7500126345020488  0.4999747309959024  0.0000000000000000
  0.0000126345020488  0.7499747309959024  0.0000000000000000
  0.2500126345020488  0.7499747309959024  0.0000000000000000
  0.5000126345020488  0.7499747309959024  0.0000000000000000
  0.7500126345020488  0.7499747309959024  0.0000000000000000
  0.1666540321646173  0.1666919356707637  0.0000000000000000
  0.4166540321646173  0.1666919356707637  0.0000000000000000
  0.6666540321646173  0.1666919356707637  0.0000000000000000
  0.9166540321646173  0.1666919356707637  0.0000000000000000
  0.1666540321646173  0.4166919356707637  0.0000000000000000
  0.4166540321646173  0.4166919356707637  0.0000000000000000
  0.6666540321646173  0.4166919356707637  0.0000000000000000
  0.9166540321646173  0.4166919356707637  0.0000000000000000
  0.1666540321646173  0.6666919356707637  0.0000000000000000
  0.4166540321646173  0.6666919356707637  0.0000000000000000
  0.6666540321646173  0.6666919356707637  0.0000000000000000
  0.9166540321646173  0.6666919356707637  0.0000000000000000
  0.1666540321646173  0.9166919356707637  0.0000000000000000
  0.4166540321646173  0.9166919356707637  0.0000000000000000
  0.6666540321646173  0.9166919356707637  0.0000000000000000
  0.9166540321646173  0.9166919356707637  0.0000000000000000
~
~


但是OUTCAR 和vasprun.xml中没有hessian elements
请问怎么会没有力常数的输出呢??
回复此楼
这只是一场游戏
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖

zhaidong1989

新虫 (初入文坛)

你好楼主,我在算立方晶体的时候也出现了同样的问题,而且算的过程中服务器提示出现错误 internal error in SETUP_DEG_CLUSTERS: NB_TOT exceeds NMAX_DEG 不知道楼主有没有遇到过?
5楼2013-11-05 15:07:57
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖
查看全部 33 个回答

花无刺

木虫 (著名写手)

二师兄

【答案】应助回帖


感谢参与,应助指数 +1
ben_ladeng: 金币+1, 谢谢参与讨论,欢迎常来 2013-07-29 21:37:00
超胞不是自己建的

要用phonopy软件来建超胞,软件就会给你加入了原子的微扰,才会有输出
2楼2013-07-29 13:38:53
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖

lu_wei07

银虫 (小有名气)

引用回帖:
2楼: Originally posted by 花无刺 at 2013-07-29 13:38:53
超胞不是自己建的

要用phonopy软件来建超胞,软件就会给你加入了原子的微扰,才会有输出

我是用phonopy建的,重复例子中的NaCl就有输出,太奇怪了
这只是一场游戏
3楼2013-07-29 14:01:18
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖

lu_wei07

银虫 (小有名气)

可能是KPOINTS出问题了,对于六方晶系,K点的选择可能要很小心,看来VASP中K点的选择很重要啊
这只是一场游戏
4楼2013-07-29 14:25:03
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖
信息提示
请填处理意见