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[求助]
VASP測(cè)試k點(diǎn)的時(shí)候報(bào)錯(cuò)
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如題,ZnO體系,在用VASP測(cè)試k點(diǎn)時(shí)候,取偶數(shù)如8*8*4、12*12*8等會(huì)報(bào)錯(cuò),錯(cuò)誤如下:VERY BAD NEWS! internal error in subroutine IBZKPT: Routine TETIRR needs special values for the k-mesh shifts! -3 但是取奇數(shù)如7*7*5等能順利計(jì)算。 這是k-point文件 Automatic 0 Monhkorst-Pack 8 8 4 0 0 0 另:對(duì)于ZnO六方纖鋅礦結(jié)構(gòu),難道是要Gamma網(wǎng)格???懇請(qǐng)大蟲或者做過ZnO計(jì)算的童鞋們幫我解答一下,謝謝了 |
VASP |
榮譽(yù)版主 (著名寫手)

金蟲 (小有名氣)
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應(yīng)該是如斑竹所說。 manual: We strongly recommend to use only Gamma centered grids for hexagonal lattices. Many tests we have performed indicate that the energy converges significantly faster with centered grids than with standard Monkhorst Pack grids. Grids generated with the ``M'' setting in the third line, in fact do not have full hexagonal symmerty. 另外樓主K空間撒點(diǎn)最好按晶格常數(shù)比例:正空間越大,倒空間越小,需要的K點(diǎn)也越少。 樓主的POSCAR能不能貼出來看看? |
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原胞 ZnO 1.00000000000000 2.813950363754663 -1.624635000000001 0.000000000000000 0.000000000000000 3.249270000000000 0.000000000000000 0.000000000000000 0.000000000000000 5.205440000000000 2 2 Direct 0.3333333333333333 0.6666666666666666 0.3825999999999994 0.6666666666666666 0.3333333333333334 0.8825999999999994 0.3333333333333333 0.6666666666666666 -0.0000000000000000 0.6666666666666666 0.3333333333333334 0.5000000000000000 |
木蟲 (著名寫手)

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