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arXiv 0801.0373cond-mat.mtrl-sci
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金属细丝与金属层间的范德华相互作用

van der Waals Interactions Between Thin Metallic Wires and Layers

N. D. Drummond, R. J. Needs

摘要:

量子蒙特卡罗(QMC)方法已被用来获得精确的结合能数据对平行细金属线和层模拟的一维和二维均匀电子气。我们比较我们的QMC结合能与随机相位近似内得到的结果,发现显着的定量差异和分歧的渐近行为在低密度的双层。我们计算了金属双线和双层体系的对关联函数。我们的QMC数据可以用来研究范德华能量泛函。

英文摘要:

Quantum Monte Carlo (QMC) methods have been used to obtain accurate binding-energy data for pairs of parallel thin metallic wires and layers modeled by 1D and 2D homogeneous electron gases. We compare our QMC binding energies with results obtained within the random phase approximation, finding significant quantitative differences and disagreement over the asymptotic behavior for bilayers at low densities. We have calculated pair-correlation functions for metallic biwire and bilayer systems. Our QMC data could be used to investigate van der Waals energy functionals.

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