期刊
JOURNAL OF CHEMICAL PHYSICS
卷 147, 期 16, 页码 -出版社
AIP Publishing
DOI: 10.1063/1.5003825
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资金
- Natural Sciences and Engineering Research Council of Canada (NSERC) [RGPIN-2015-04814]
We suggest a non-iterative analytic method for constructing the exchange-correlation potential, v(XC)(r), of any singlet ground-state two-electron system. The method is based on a convenient formula for v(XC)(r) in terms of quantities determined only by the system's electronic wave function, exact or approximate, and is essentially different from the Kohn-Sham inversion technique. When applied to Gaussian-basis-set wave functions, the method yields finite-basis-set approximations to the corresponding basis-set-limit v(XC)(r), whereas the Kohn-Sham inversion produces physically inappropriate (oscillatory and divergent) potentials. The effectiveness of the procedure is demonstrated by computing accurate exchange-correlation potentials of several two-electron systems (helium isoelectronic series, H-2, H-3(+)) using common ab initio methods and Gaussian basis sets. Published by AIP Publishing.
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