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[求助]
HSE請(qǐng)教
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投了一篇文章,文章中通過(guò)DFT計(jì)算基得到了一個(gè)數(shù)據(jù),審稿人提出異議 Another weak point of the present work is that is relies on the GGA exchange-correlation functional . This functional leads to a well known severe underestimation of the band gap of semiconductors and insulators . This casts serious doubt on the value of the formation energy of negatively charged defects and of electron affinities. Thus, the *** obtained in the present work are unfortunately uncertain. The authors may want to argue that since the *** is the difference between two systems, the band gap problem error is canceled in some way. But they should very carefully discuss this point. 我想由于是差值,2個(gè)體系的誤差相減,這個(gè)GGA所產(chǎn)生的誤差應(yīng)該可以忽略不計(jì)的。我的想法是通過(guò)一個(gè)例子,運(yùn)用HSE和GGA兩種方法來(lái)計(jì)算說(shuō)明,GGA不會(huì)影響我的參數(shù)的合理性。 但是,我對(duì)于HSE不了解,還請(qǐng)大神指教! PS: 由于我的缺陷體系大概有280個(gè)原子,我能不能用在采用GGA優(yōu)化好的結(jié)構(gòu)的基礎(chǔ)之上,采用HSE進(jìn)行自洽計(jì)算(我只關(guān)心能量)。在INCAR中加入INCAR 中,加入 LHFCALC = .TRUE. ; HFSCREEN = 0.2 ALGO = Damped ; TIME = 0.4 |
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