Although the many-body expansion (MBE) approach is widely applied to estimate the energy of large systems containing weak interactions, it is inapplicable to calculating the energies of covalent or metal clusters. In this work, we propose an interaction many-body expansion (IMBE) to calculate the energy of atomic clusters containing covalent bonds. In this approach, the energy of a system is expressed as the sum of the energy of atoms and the interaction energy between the atom and its surrounding atoms. The IMBE method is first applied to calculate the energies of nitrogen clusters, in which the interatomic interactions are truncated to four-body terms. The results show that the IMBE approach could significantly reduce the energy error for nitrogen clusters compared with the traditional MBE method. The weak size and structure dependence of the IMBE error with respect to DFT calculations indicates the IMBE method has good potential application in estimating energy of large covalent systems.
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December 2021
Research Article|
December 01 2021
A new many-body expansion scheme for atomic clusters: Application to nitrogen clusters †
Special Collection:
Virtual issue on Theoretical and Computational Chemistry (2021)
Wei Yan;
Wei Yan
‡
a
State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences
, Wuhan 430071, China
b
University of Chinese Academy of Sciences
, Beijing 100049, China
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Yong-fa Zhu;
Yong-fa Zhu
‡
a
State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences
, Wuhan 430071, China
b
University of Chinese Academy of Sciences
, Beijing 100049, China
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Wei-yu Xie;
Wei-yu Xie
c
Institute of Chemical Materials, China Academy of Engineering Physics
, Mianyang 621900, China
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Hong-wei Song;
Hong-wei Song
a
State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences
, Wuhan 430071, China
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Chao-yang Zhang;
Chao-yang Zhang
*
c
Institute of Chemical Materials, China Academy of Engineering Physics
, Mianyang 621900, China
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Ming-hui Yang
Ming-hui Yang
*
a
State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences
, Wuhan 430071, China
d
Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology
, Wuhan 430071, China
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Chin. J. Chem. Phys. 34, 717–727 (2021)
Article history
Received:
September 23 2021
Accepted:
October 24 2021
Citation
Wei Yan, Yong-fa Zhu, Wei-yu Xie, Hong-wei Song, Chao-yang Zhang, Ming-hui Yang; A new many-body expansion scheme for atomic clusters: Application to nitrogen clusters. Chin. J. Chem. Phys. 1 December 2021; 34 (6): 717–727. https://doi.org/10.1063/1674-0068/cjcp2109173
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