Three-body non-additive forces between spin-polarized alkali atoms

Details Three-body non-additive forces between spin-polarized alkali atoms Three-body non-additive forces between spin-polarized alkali atoms

2002-11-04

arxiv.org/abs/cond-mat/0211065v1

Physics

Condensed Matter

Soft Condensed Matter

4 pages, 3 figures (in 5 files)

Scientific paper

10.1103/PhysRevA.67.054702

Three-body non-additive forces in systems of three spin-polarized alkali atoms (Li, Na, K, Rb and Cs) are investigated using high-level ab initio calculations. The non-additive forces are found to be large, especially near the equilateral equilibrium geometries. For Li, they increase the three-atom potential well depth by a factor of 4 and reduce the equilibrium interatomic distance by 0.9 A. The non-additive forces originate principally from chemical bonding arising from sp mixing effects.

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