Multireference Density Functional Theory for Describing Ground and Excited States with Renormalized Singles.
Multireference Density Functional Theory for Describing Ground and Excited States with Renormalized Singles.
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DOI:
10.1021/acs.jpclett.1c03913
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发表时间:
2022-01-27
影响因子:
5.7
通讯作者:
Yang, Weitao
中科院分区:
文献类型:
--
作者:
Li, Jiachen;Chen, Zehua;Yang, Weitao
We applied renormalized singles (RS) in the multireference density functional theory (DFT) to calculate accurate energies of ground and excited states. The multireference DFT approach determines the total energy of the N-electron system as the sum of the (N − 2)-electron energy from a density functional approximation (DFA) and the two-electron addition energies from the particle–particle Tamm–Dancoff approximation (ppTDA), naturally including multireference description. The ppTDA@RS-DFA approach uses the RS Hamiltonian capturing all singles contributions in calculating two-electron addition energies, and its total energy is optimized with the optimized effective potential method. It significantly improves the original ppTDA@DFA. For ground states, ppTDA@RS-DFA properly describes dissociation curves tested and the double bond rotation of ethylene. For excited states, ppTDA@RS-DFA provides accurate excitation energies and largely eliminates the DFA dependence. ppTDA@RS-DFA thus provides an efficient multireference approach to systems with static correlation.
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影响因子:
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DOI:
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期刊:
The journal of physical chemistry letters
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DOI:
10.1021/acs.jpclett.9b03423
发表时间:
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期刊:
The journal of physical chemistry letters
影响因子:
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通讯作者:
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