DFT + U Study of Uranium Dioxide and Plutonium Dioxide with Occupation Matrix Control.
DFT + U Study of Uranium Dioxide and Plutonium Dioxide with Occupation Matrix Control.
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DOI:
10.1021/acs.jpcc.2c03804
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发表时间:
2022-07-14
影响因子:
3.7
通讯作者:
Kaltsoyannis, Nikolas
中科院分区:
文献类型:
--
作者:
Chen, Jia-Li;Kaltsoyannis, Nikolas
DFT + U with occupation matrix control (OMC) is applied to study computationally bulk UO2 and PuO2, the latter for the first time. Using the PBESol functional in conjunction with OMC locates AFM and NM ground states for UO2 and PuO2, respectively, in agreement with experimental findings. By simulating the lattice parameter, magnetic moment, band gap, and densities of states, U = 4.0 eV is recommended for AFM UO2, yielding data close to experiments for all considered properties. U = 4.5 and 4.0 eV are recommended for NM and AFM PuO2, respectively, though much larger U values (c. 10 eV) are required to yield the most recently reported PuO2 band gap. For both oxides, several excited states have similar properties to the ground state, reinforcing the need to employ OMC wherever possible.
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影响因子:
3.7
作者:
Kresse, G;Furthmuller, J
通讯作者:
Furthmuller, J
影响因子:
3.7
作者:
Larson, P.;Lambrecht, Walter R. L.;van Schilfgaarde, Mark
通讯作者:
van Schilfgaarde, Mark
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3.7
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影响因子:
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通讯作者:
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3.7
作者:
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通讯作者:
PACK, JD