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largehoo

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[求助] 求助~ 关于 VASP 和 NAO 基组

最近在用VASP重复一篇文献中的计算
原文用的是 FHI-aims (Frit-Haber-Institut ab initio molecular simulations code)程序,在计算中用到了1阶NAO基组(tier 1 NAO basis)和3阶NAO基组(tier 3 NAO basis)。

在参考文献中看到这样的内容:
FHI-aims NAO basis sets for cerium: tier 1:[Xe]+2s2p2d2f 1g; tier 2: [Xe]+3s3p4d3f 2g1h; and tier 3: [Xe]+4s4p5d5f 3g2h.

以及看到smutao在量子化学区发帖提到:

NAO – (Natural Atomic Orbital)

natural orbital – those orbitals for which the first-order density matrix is diagonal; each will contain some non-integer number of electrons between 0 and 2. Usually discussed in the context of a correlated calculation. RHF calculations give molecular orbitals that are also natural orbitals. The NOs are the orbitals for which the CI expansion converges fastest. Particularly valuable in modeling organometallic complexes.

请问如何在VASP中实现 tier 1/3 NAO basis 的计算,或者有什么替代的方法?
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