Persistence Of Covalent Bonding In Liquid Silicon Probed By Inelastic X-Ray Scattering
PHYSICAL REVIEW LETTERS(2012)
摘要
Metallic liquid silicon at 1787 K is investigated using x-ray Compton scattering. An excellent agreement is found between the measurements and the corresponding Car-Parrinello molecular dynamics simulations. Our results show persistence of covalent bonding in liquid silicon and provide support for the occurrence of theoretically predicted liquid-liquid phase transition in supercooled liquid states. The population of covalent bond pairs in liquid silicon is estimated to be 17% via a maximally localized Wannier function analysis. Compton scattering is shown to be a sensitive probe of bonding effects in the liquid state.
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关键词
liquid silicon probed,covalent bonding,x-ray
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