Cleavage force as a function of separation in a finite model of silicon with a chemically bonded force field

Matthai, Clarence Cherian and March, N. H. 1997. Cleavage force as a function of separation in a finite model of silicon with a chemically bonded force field. Journal of Physics and Chemistry of Solids 58 (5) , pp. 765-767. 10.1016/S0022-3697(96)00197-7

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Abstract

A finite cleaved model of silicon has parallel faces at separation a + z, with a the original interplanar spacing perpendicular to the cleavage plane. The cleavage force F(z) is proportional to z for small z and, due to van der Waals interaction, falls off at large z as z− 3. In the present work, for a finite block of Si, an estimate is presented of the maximum value of F(z), and its corresponding position zmax, using coordination dependent interatomic potentials. The position zmax is found to accord semiquantitatively with that separation required to break the covalent bond in the H2 molecule.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Physics and Astronomy
Subjects:	Q Science > QC Physics
Uncontrolled Keywords:	A. surfaces; D. surface properties.
Publisher:	Elsevier
ISSN:	00223697
Last Modified:	04 Jun 2017 06:48
URI:	https://orca.cardiff.ac.uk/id/eprint/64912

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