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416726641金蟲 (正式寫手)
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[求助]
大家?guī)头治鱿聦徃鍖<蚁胍腋墒裁?
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It is well that GGA/LDA underestimate energy band gap severely according the calculated band structure/dos/optical properties are not proper. Authors has not suggested any way to get out from this problem. All these calculation have been performed with primitive cell which consist 2 atoms. I suggest that authors must perform excited state calculation to find more reliable electronic and optical properties of the given materials. It also suggested that such kind of excited calculation has been also done which has not been cited by the authors. |

金蟲 (正式寫手)

專家顧問 (著名寫手)
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專家經(jīng)驗: +174 |
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首先,審稿人的第一句話是不是少了個詞啊……個人感覺應該是it is well known that GGA/LDA underestimate.... 也就是說,使用DFT方法,是會低估帶隙的,所以基于此的能帶、態(tài)密度以及光學性質(zhì)都是不夠好的。 而作者并沒有給出任何解決此問題的方法。 并且,所有的計算都是基于2個原子的原胞。 所以,審稿人建議作者必須進行激發(fā)態(tài)計算,以找到目標材料更可靠的電子和光學性質(zhì)。但是,這些材料的激發(fā)態(tài)計算早就已經(jīng)被做過了,雖然作者沒有引用那些文獻(搞不懂這人為啥又說it suggested,被動語態(tài)還沒用全)。 總而言之,審稿人估計也在糾結(jié),因為LZ做的計算過于簡單,并且對傳統(tǒng)存在的問題沒有絲毫的修正(激發(fā)態(tài)計算),更重要的,這些簡單體系的激發(fā)態(tài)計算也都被做過了…… 激發(fā)態(tài)的計算一般對于非周期的分子,是使用TDDFT。對于周期體系,則更多使用GW方法和BSE方法,有時出于需要,也把GW與BSE結(jié)合使用。 |

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