Recrystallization of an amorphized epitaxial phase-change alloy: A phoenix arising from the ashes

P. Rodenbach, A. Giussani, K. Perumal, M. Hanke, M. Dubslaff, H. Riechert, R. Calarco, M. Burghammer, A. V. Kolobov, P. Fons

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16 Citations (Scopus)

Abstract

Epitaxial Ge 2Sb 2Te 5 films grown on Si(111) by molecular beam epitaxy were reversibly switched between crystalline and amorphous states over a large area using femtosecond laser pulses. The structural and spatial homogeneity of the as-grown epitaxial and laser-switched areas on the sample were investigated by synchrotron nanofocus high resolution x-ray diffraction. The investigation clearly demonstrated that the single crystalline metastable cubic phase of Ge 2Sb 2Te 5 is restored after switching. No polycrystalline features, not only on the average but even on the nanometer scale of the x-ray beam, were observed.

Original languageEnglish
Article number061903
JournalApplied Physics Letters
Volume101
Issue number6
DOIs
Publication statusPublished - 2012 Aug 6
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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    Rodenbach, P., Giussani, A., Perumal, K., Hanke, M., Dubslaff, M., Riechert, H., Calarco, R., Burghammer, M., Kolobov, A. V., & Fons, P. (2012). Recrystallization of an amorphized epitaxial phase-change alloy: A phoenix arising from the ashes. Applied Physics Letters, 101(6), [061903]. https://doi.org/10.1063/1.4742919