What is the origin of activation energy in phase-change film?

Junji Tominaga, Takayuku Shima, Paul Fons, Robert Simpson, Masashi Kuwahara, Alexander Kolobov

Research output: Contribution to journalArticlepeer-review

48 Citations (Scopus)


Activation energy is one of the basic parameters used to estimate the physical and chemical features of optical and electrical phase-change (PC) films. However, its origin has not been discussed well because of insufficient understanding of the amorphous structures. In this paper, we reveal the origin of the activation energy using a GeSbTe-superlattice model and ab-initio local density approximation (LDA) calculations. The simulated energy required for transition from amorphous to crystal formation in a 9-atomic system was 2.34 eV; This is in good agreement with experimentally reported values.

Original languageEnglish
Article number03A053
JournalJapanese journal of applied physics
Issue number3 PART 2
Publication statusPublished - 2009 Mar
Externally publishedYes

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)


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