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Latham, C. D., Haffenden, G. L., Heggie, M. I., Suarez-Martinez, I. & Ewels, C. P. (2010) Comment on "Increase in specific heat and possible hindered rotation of interstitial C-2 molecules in neutron-irradiated graphite". Phys. Rev. B, 82 056101. 
Added by: Laurent Cournède (2016-03-10 21:37:32)
Type de référence: Article
DOI: 10.1103/PhysRevB.82.056101
Numéro d'identification (ISBN etc.): 1098-0121
Clé BibTeX: Latham2010
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Catégories: PMN
Mots-clés: Defects, diffusion, Nucleation, radiation damage
Créateurs: Ewels, Haffenden, Heggie, Latham, Suarez-Martinez
Collection: Phys. Rev. B
Consultations : 9/397
Indice de consultation : 2%
Indice de popularité : 0.5%
Résumé     
Iwata and Watanabe's model for the observed low-temperature specific heat of neutron-irradiated graphite [T. Iwata and M. Watanabe, Phys. Rev. B 81, 014105 (2010)] assumes that self-interstitial atoms exist as clusters of nearly free C-2 molecules. We suggest that their hypothesis is not supported by other experiments and theory, including our own calculations. Not only is it inconsistent with the long-known kinetics of interstitial prismatic dislocation loop formation, density-functional theory shows that the di-interstitial is covalently bonded to the host crystal. In such calculations no prior assumptions are made about the nature of the bonding, covalent or otherwise.
Added by: Laurent Cournède  
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