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李路lulu金蟲 (小有名氣)
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[求助]
在高斯候總?cè)绾斡肐OP來確定交換泛函的比例?我用的是PBE0方法 已有1人參與
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| 希望有詳細(xì)的輸入文件和注解!金幣好說! |
木蟲 (小有名氣)
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怎么又是你?以下是高斯手冊(cè)里的內(nèi)容: The 1996 pure functional of Perdew, Burke and Ernzerhof [Perdew96a, Perdew97], as made into a hybrid by Adamo [Adamo99a]. The keyword is PBE1PBE. This functional uses 25% exchange and 75% correlation weighting, and is known in the literature as PBE0. 如果你改了,那肯定不能叫PBE0了。 下面是如何自定義了,同樣來自高斯手冊(cè): User-Defined Models. Gaussian 09 can use any model of the general form: P2EXHF + P1(P4EXSlater + P3ΔExnon-local) + P6EClocal + P5ΔECnon-local The only available local exchange method is Slater (S), which should be used when only local exchange is desired. Any combinable non-local exchange functional and combinable correlation functional may be used (as listed previously). The values of the six parameters are specified with various non-standard options to the program: IOp(3/76=mmmmmnnnnn) sets P1 to mmmmm/10000 and P2 to nnnnn/10000. P1 is usually set to either 1.0 or 0.0, depending on whether an exchange functional is desired or not, and any scaling is accomplished using P3 and P4. IOp(3/77=mmmmmnnnnn) sets P3 to mmmmm/10000 and P4 to nnnnn/10000. IOp(3/78=mmmmmnnnnn) sets P5 to mmmmm/10000 and P6 to nnnnn/10000. For example, IOp(3/76=1000005000) sets P1 to 1.0 and P2 to 0.5. Note that all values must be expressed using five digits, adding any necessary leading zeros. Here is a route section specifying the functional corresponding to the B3LYP keyword: #P BLYP IOp(3/76=1000002000) IOp(3/77=0720008000) IOp(3/78=0810010000) The output file displays the values that are in use: IExCor= 402 DFT=T Ex=B+HF Corr=LYP ExCW=0 ScaHFX= 0.200000 ScaDFX= 0.800000 0.720000 1.000000 0.810000 where the value of ScaHFX is P2, and the sequence of values given for ScaDFX are P4, P3, P6 and P5. 上面給的是如何自定義B3LYP的方法,PBE0自然要從純泛函的形式PBEPBE出發(fā)自定義。剩下的自己好好領(lǐng)悟,不要再問了。不能讓別人手把手一步一步教你,應(yīng)該學(xué)會(huì)獨(dú)立思考?赡芪艺f的不太好聽,但希望你能理解。 |
金蟲 (小有名氣)
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