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我真沒頭發(fā)新蟲 (初入文壇)
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[求助]
計算氮化鎵禁帶寬度偏小 已有1人參與
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我想問一下,我用hse06計算氮化鎵禁帶寬度變小怎么解決。 ENCUT = 520 PREC = Accurate LREAL = .FALSE. ADDGRID = .TRUE. LASPH = .TRUE. LMAXMIX = 4 ISMEAR = 0 SIGMA = 0.05 EDIFF = 1E-6 NELM = 120 NSW = 0 IBRION = -1 ISYM = 0 ISTART = 0 ICHARG = 2 LWAVE = .TRUE. LCHARG = .TRUE. LHFCALC = .TRUE. AEXX = 0.25 HFSCREEN = 0.2 GGA = PE ALGO = Damped TIME = 0.4 PRECFOCK = Normal K-Spacing Value to Generate K-Mesh: 0.040 0 Gamma 12 12 5 0.0 0.0 0.0 這是我的incar文件和kpoints文件,我把a(bǔ)exx改成0.37才能得到3.44eV接近實驗值的禁帶寬度。但我導(dǎo)師說aexx不能改這么高,請問一下怎么才能得到一個近似實驗值的禁帶寬度啊 發(fā)自小木蟲手機(jī)客戶端 |
新蟲 (初入文壇)
版主 (文學(xué)泰斗)
rky
木蟲 (正式寫手)
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ENCUT = 520 PREC = Accurate LREAL = .FALSE. ADDGRID = .TRUE. LASPH = .TRUE. LMAXMIX = 4 ISMEAR = 0 SIGMA = 0.05 EDIFF = 1E-6 NELM = 150 NSW = 0 IBRION = -1 ISYM = 0 ISTART = 0 ICHARG = 2 LHFCALC = .TRUE. AEXX = 0.25 HFSCREEN = 0.2 GGA = PE ALGO = Damped TIME = 0.4 PRECFOCK = Accurate LWAVE = .FALSE. LCHARG = .TRUE. |
木蟲 (正式寫手)
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