Accurate Ab initio calculation of ionization potentials of the first-row transition metals with the configuration-interaction quantum Monte Carlo technique.

Accurate Ab initio calculation of ionization potentials of the first-row transition metals with the configuration-interaction quantum Monte Carlo technique.
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利用构型相互作用量子蒙特卡罗技术精确从头计算第一行过渡金属的电离势。

DOI:
10.1103/physrevlett.114.033001
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发表时间:
2015
影响因子:
8.6
通讯作者:
A. Alavi
A. Alavi
中科院分区:
物理与天体物理1区
文献类型:
--
作者:
Robert E. Thomas;George H. Booth;A. Alavi

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第一行过渡金属原子的精确电离势是通过引发剂全组态量子蒙特卡罗技术获得的,在指数大的希尔伯特空间中对电子薛定谔方程进行随机积分,平均绝对误差为0.13千卡/摩尔(5 meV)。这种准确性需要相关的3 p半芯电子,在某些情况下,3s的流形,沿着与外推的相关能量的完整的基组限制,并提供了一个新的理论基准,这些系统的电离势。
Accurate ionization potentials of the first-row transition-metal atoms are obtained via the initiator full configuration quantum Monte Carlo technique, performing a stochastic integration of the electronic Schrödinger equation in exponentially large Hilbert spaces, with a mean absolute error of 0.13  kcal/mol (5 meV). This accuracy requires correlation of the 3p semicore electrons and in some cases the 3s manifold, along with extrapolation of the correlation energies to the complete-basis-set limit, and provides a new theoretical benchmark for the ionization potentials of these systems.