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fo3mt2金蟲 (小有名氣)
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[求助]
HSE06雜化泛函計算能帶問題 已有1人參與
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大家好, 向大家請教一個問題,我在使用VASP代碼里的HSE06雜化泛函計算體系的能帶結(jié)構(gòu),我把自洽計算步驟產(chǎn)生的IBZKPT文件拷貝到了非自洽計算步驟里,并改名為KPOINTS文件,隨后我又把能帶的k路徑坐標粘貼在KPOINTS文件的后面。(這個能帶的k路徑坐標是我之前利用VASP的PBE泛函計算相同體系的能帶時,在OUTCAR文件里產(chǎn)生的k點坐標)。新的KPOINTS文件內(nèi)容如下。 Automatically generated mesh 61 Reciprocal lattice 0.00000000000000 0.00000000000000 0.00000000000000 1 0.09090909090909 0.00000000000000 0.00000000000000 2 ... -0.09090909090909 0.45454545454546 0.00000000000000 2 0.00000000 0.00000000 0.00000000 0.000 ... 0.50000000 0.50000000 0.00000000 0.000 非自洽計算步驟里的INCAR文件內(nèi)容如下。 Syetem = C_based ISTART = 1 LWAVE = .FALSE. LCHARGE = .TRUE. ICHARG = 11 IVDW = 12 ISPIN = 2 MAGMOM = 0.156 -0.155 -0.096 0.096 -0.156 0.155 -0.156 0.155 0.096\ -0.096 0.156 -0.155 -0.156 0.155 0.096 -0.096 0.156 -0.155\ 0.156 -0.155 -0.096 0.096 -0.156 0.155 LORBIT = 11 ENCUT = 500 ISMEAR = 0 SIGMA = 0.03 PREC = Accurate LHFCALC = .TRUE. AEXX = 0.25 HFSCREEN = 0.2 ALGO = Damped TIME = 0.4 PRECFOCK = Fast ISYM = 3 LREAL = Auto NELMIN = 5 NELM = 700 NELMDL = -10 EDIFF = 1e-5 NPAR = 32 KPAR= 16 計算結(jié)束后,我利用p4v軟件讀取vasprun.xml文件,但畫出的能帶完全錯誤。而且輸出文件也提示警告信息,說k點與晶格的對稱性不匹配。警告信息如下。 ----------------------------------------------------------------------------- | | | W W AA RRRRR N N II N N GGGG !!! | | W W A A R R NN N II NN N G G !!! | | W W A A R R N N N II N N N G !!! | | W WW W AAAAAA RRRRR N N N II N N N G GGG ! | | WW WW A A R R N NN II N NN G G | | W W A A R R N N II N N GGGG !!! | | | | Your generating k-point grid is not commensurate to the symmetry | | of the lattice. This can cause slow convergence with respect | | to k-points for HF type calculations | | suggested SOLUTIONS: | | ) if not already the case, use automatic k-point generation | | ) shift your grid to Gamma (G) (e.g. required for hex or fcc lattice) | | | ----------------------------------------------------------------------------- 我不知道是哪里出了問題。能麻煩大家給些建議,解決這個問題嗎? 謝謝大家啦。 |
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