Materials Science

Silicon sheds its harmonicity

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Science  13 Apr 2018:
Vol. 360, Issue 6385, pp. 167-168
DOI: 10.1126/science.360.6385.167-b

The widespread technological uses for silicon make understanding this element's physical properties very important. Kim et al. performed inelastic neutron scattering experiments on single crystals of silicon to measure the vibrational properties up to 1500 K. Silicon has some odd thermal properties at certain temperatures, and these experiments show the need to account for a number of factors to explain the unusual thermal expansion behavior. This in-depth look at silicon helps refine theoretical models and provides a better understanding of this technologically important material.

Proc. Natl. Acad. Sci. U.S.A. 10.1073/pnas.1707745115 (2018).

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