Abrupt stress induced transformation in amorphous carbon films with a highly conductive transition phase

Lau, D, McCulloch, D, Taylor, M, Partridge, J, McKenzie, D, Marks, N, Teo, E and Tay, B 2008, 'Abrupt stress induced transformation in amorphous carbon films with a highly conductive transition phase', Physical Review Letters, vol. 100, no. 17, pp. 1-4.


Document type: Journal Article
Collection: Journal Articles

Title Abrupt stress induced transformation in amorphous carbon films with a highly conductive transition phase
Author(s) Lau, D
McCulloch, D
Taylor, M
Partridge, J
McKenzie, D
Marks, N
Teo, E
Tay, B
Year 2008
Journal name Physical Review Letters
Volume number 100
Issue number 17
Start page 1
End page 4
Total pages 3
Publisher American Physical Society
Abstract We demonstrate that when, and only when, the biaxial stress is increased above a critical value of 6±1 GPa during the growth of a carbon film at room temperature, tetrahedral amorphous carbon is formed. This confirms that the stress present during the formation of an amorphous carbon film determines its sp3 bonding fraction. In the vicinity of the critical stress, a highly oriented graphitelike material is formed which exhibits low electrical resistance and provides Ohmic contacts to silicon. Atomistic simulations reveal that the structural transitions are thermodynamically driven and not the result of dynamical effects.
Subject Nanomaterials
DOI - identifier 10.1103/PhysRevLett.100.176101
Copyright notice © 2008 The American Physical Society
ISSN 0031-9007
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