Energy landscape of small clusters of self-interstitial dumbbells in iron

M.-C. Marinica,1 F. Willaime,1 and N. Mousseau2 1CEA, DEN, Service de Recherches de Metallurgie Physique, F-91191 Gif-sur-Yvette, France 2Departement de Physique and Regroupement Quebecois Sur les Materiaux de Pointe, Universite de Montreal, Case Postale 6128, Succursale Centre-ville, Montreal, Quebec H3C 3J7, Canada (Received 2 September 2010; revised manuscript received 15 January 2011; published 17 March 2011)