Incrementally Corrected Periodic Local MP2 Calculations: I. The Cohesive Energy of Molecular Crystals.
Incrementally Corrected Periodic Local MP2 Calculations: I. The Cohesive Energy of Molecular Crystals.
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增量修正周期性局部 MP2 计算:I 分子晶体的内聚能
DOI:
10.1021/ct400797w
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发表时间:
2013
影响因子:
5.5
通讯作者:
D. Usvyat
中科院分区:
文献类型:
--
作者:
C. Müller;D. Usvyat
A method for accurate calculations of the cohesive energy of molecular crystals is presented. The cohesive energy is evaluated as a sum of several components. The major contribution is captured by periodic Hartree–Fock (HF) coupled with the local Møller–Plesset perturbation theory of second order (LMP2) with a triple-ζ basis set. Post-MP2 corrections and corrections for the basis set incompleteness are calculated from inexpensive incremental calculations with finite clusters. This is an essential improvement with respect to the periodic LMP2 method and allows for results of benchmark quality for crystalline systems. The proposed technique is superior to the standard incremental scheme as concerns the cluster size and basis set convergence of the results. In contrast to the total energy or electron correlation energy, which are evaluated in standard incremental calculations, post-MP2 and basis set corrections are rather insensitive to approximations and converge quickly both in terms of the order of the increments and the number of terms at a given order. Evaluation of the incremental corrections within the sub-kJ/mol precision requires computing very few of the most compact two-center and three-center non-embedded clusters, making the whole correction scheme computationally inexpensive. This method as well as alternative routes to compute the cohesive energy via the incremental scheme are tested on two molecular crystals: carbon dioxide (CO2) and hydrogen cyanide (HCN).
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DOI:
--
发表时间:
2005
期刊:
J. Chem. Phys. 122
影响因子:
--
作者:
H.Katagiri
通讯作者:
H.Katagiri
影响因子:
1.7
作者:
U. Birkenheuer;P. Fulde;H. Stoll
通讯作者:
H. Stoll
影响因子:
3.7
作者:
Carsten Müller;D. Usvyat;H. Stoll
通讯作者:
H. Stoll
影响因子:
4.4
作者:
Furche, Filipp
通讯作者:
Furche, Filipp
影响因子:
1.9
作者:
Carsten Müller;K. Hermansson
通讯作者:
K. Hermansson