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(H_2O)_6 on a Virtual Metal Surface: Many-Body Effects in the Bilayer Structure

机译:虚拟金属表面上的(H_2O)_6:双层结构中的多体效应

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Many-body effects in a water hexamer attached to a metal surface have been studied by quantum calculations. The metal component of the interface has been replaced by a set of geometrical constraints (virtual surface) [J. Phys. Chem. A 2000, 105, 4084-4095] which permits the analysis of the properties of the interface independently of the precise electronic structure of the metal, as a function of the surface latticeconstant. Our calculations show that cooperative forces have a significant influence on the energy and geometry of the metal-water interface. The energy decomposition of the energy of formation of the water hexamer demonstrates how strong cooperative effects favor the growth of the water bilayer in the experimentally observed range of surface lattice constants, while a model based solely on two-center energies predicts the formation of the water bilayer at unphysically large values of surface lattice constant.
机译:通过量子计算研究了附着在金属表面的六聚体中的多体效应。界面的金属成分已被一组几何约束(虚拟表面)取代[J.物理化学2000,105,4084-4095]允许根据表面晶格常数来独立于金属的精确电子结构来分析界面的性质。我们的计算表明,协作力对金属-水界面的能量和几何形状有重大影响。水六聚体形成能的能量分解表明,在实验观察到的表面晶格常数范围内,强大的协同作用如何促进水双层的生长,而仅基于二中心能的模型预测了水的形成双层的表面晶格常数处于非自然的大值。

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