The Analytical Theory of Bulk Melting II: Variational Method Solution in   the FCC Crystal
  Continuing the arguments in Paper I (arXiv: cond-mat/0405487), we model the temperature dependence of interstitial defects in a surface-free face-centered-cubic (fcc) elemental crystal and obtain the free energy and correlation behavior based on variational methods. We show that the avalanche of interstitial defects is the instability mechanism at the melting point that bridges Lindemann and Born criteria. 
Yajun Zhou and Xiaofeng Jin