This title appears in the Scientific Report : 2016 

Crystallization processes in the phase change material Ge$_{2}$Sb$_{2}$Te$_{5}$: Unbiased density functional/molecular dynamics simulations
Kalikka, J.
Akola, Jaakko / Jones, Robert O. (Corresponding author)
Quanten-Theorie der Materialien; IAS-1
JARA - HPC; JARA-HPC
JARA-FIT; JARA-FIT
Quanten-Theorie der Materialien; PGI-1
Physical review / B, 94 (2016) 13, S. 134105
Woodbury, NY Inst. 2016
10.1103/PhysRevB.94.134105
Journal Article
Controlling Configuration-Based Phenomena
Controlling Spin-Based Phenomena
OpenAccess
OpenAccess
Please use the identifier: http://hdl.handle.net/2128/12547 in citations.
Please use the identifier: http://dx.doi.org/10.1103/PhysRevB.94.134105 in citations.
Three extensive density functional/molecular dynamics simulations of the crystallization of amorphous Ge2Sb2Te5 (460 atoms) [Phys. Rev. B 90, 184109 (2014)] have been completed with simulation times of up to 8.2 ns. Together with the results of earlier simulations with and without a crystallite seed, the results clarify essential features of a complicated process. They emphasize, in particular, the stochastic nature of crystallization, the effect of bond orientations and percolation, and the importance of extended simulations of sufficiently large samples. This is particularly evident in describing the role of crystallites that can merge to form larger units or hinder complete crystallization by the formation of grain boundaries. The total pair distribution functions for the final structures are compared with available neutron and x-ray diffraction data