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arXiv 0708.2870cond-mat.mtrl-sci
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分子系统的电响应:自相互作用的功率修正的Kohn-Sham理论

Electrical response of molecular systems: the power of self-interaction corrected Kohn-Sham theory

T. Körzdörfer, M. Mundt, S. Kümmel

摘要:

扩展分子体系的电子响应性质的准确预测一直是传统的显式密度泛函的挑战。我们证明,严格实施内科恩-沙姆理论通过优化的有效势(OEP)的自相互作用校正产生的极化率接近的那些从高度精确的波函数为基础的计算和超过的质量的精确交换OEP。讨论了用OEP-SIC泛函得到的轨道结构及其近似。

英文摘要:

The accurate prediction of electronic response properties of extended molecular systems has been a challenge for conventional, explicit density functionals. We demonstrate that a self-interaction correction implemented rigorously within Kohn-Sham theory via the Optimized Effective Potential (OEP) yields polarizabilities close to the ones from highly accurate wavefunction-based calculations and exceeding the quality of exact-exchange-OEP. The orbital structure obtained with the OEP-SIC functional and approximations to it are discussed.

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