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@INPROCEEDINGS{Wuttig:905437,
      author       = {Wuttig, Matthias},
      title        = {{C}rystallization and {V}itrification {K}inetics by
                      {D}esign: {T}he {R}ole of {C}hemical {B}onding},
      reportid     = {FZJ-2022-00678},
      year         = {2021},
      abstract     = {Controlling a state of material between its crystalline and
                      glassy phase has fostered many real-world applications.
                      Nevertheless, design rules for crystallization and
                      vitrification kinetics still lack predictive power. Here, we
                      identify stoichiometry trends for these processes in phase
                      change materials, i.e. along the GeTe-GeSe, GeTe-SnTe, and
                      GeTe-Sb2Te3 pseudo-binary lines employing a pump-probe laser
                      setup and calorimetry. We discover a clear stoichiometry
                      dependence of crystallization speed along a line connecting
                      regions characterized by two fundamental bonding types,
                      metallic and covalent bonding. Increasing covalency slows
                      down crystallization by six orders of magnitude and promotes
                      vitrification. The stoichiometry dependence is correlated
                      with material properties, such as the optical properties of
                      the crystalline phase and a bond indicator, the number of
                      electrons shared between adjacent atoms. A quantum-chemical
                      map explains these trends and provides a blueprint to design
                      crystallization kinetics.},
      month         = {Dec},
      date          = {2021-12-20},
      organization  = {MRS India, virtual (India), 20 Dec
                       2021 - 22 Dec 2021},
      subtyp        = {Invited},
      cin          = {PGI-10},
      cid          = {I:(DE-Juel1)PGI-10-20170113},
      pnm          = {5233 - Memristive Materials and Devices (POF4-523)},
      pid          = {G:(DE-HGF)POF4-5233},
      typ          = {PUB:(DE-HGF)6},
      url          = {https://juser.fz-juelich.de/record/905437},
}