We use an orbital-free kinetic-energy functional to study the equilibrium structure and bonding of small Siₙ clusters up to n=6. The results are compared with those obtained using the tight-binding density-functional scheme, Langevin molecular dynamics, and local-density approximation. Bond lengths and angles are reproduced very well, but values of cohesive energy are less accurate.
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Govind et al. (1995) studied this question.
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