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

doi:10.1063/1.4742919

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

Research output: Contribution to journal › Article › peer-review

17 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 language	English
Article number	061903
Journal	Applied Physics Letters
Volume	101
Issue number	6
DOIs	https://doi.org/10.1063/1.4742919
Publication status	Published - 2012 Aug 6
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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10.1063/1.4742919

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

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.",

author = "P. Rodenbach and A. Giussani and K. Perumal and M. Hanke and M. Dubslaff and H. Riechert and R. Calarco and M. Burghammer and Kolobov, {A. V.} and P. Fons",

note = "Funding Information: The authors acknowledge the technical support of S. Behnke, C. Stemmler. Support for this work was provided by the Deutsche Forschungsgemeinschaft (CA 664/3-1), the Deutsche Akademische Austauschdienst, and the European Synchrotron Radiation Facility (MA-1236).",

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language = "English",

volume = "101",

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T1 - Recrystallization of an amorphized epitaxial phase-change alloy

T2 - A phoenix arising from the ashes

AU - Rodenbach, P.

AU - Giussani, A.

AU - Perumal, K.

AU - Hanke, M.

AU - Dubslaff, M.

AU - Riechert, H.

AU - Calarco, R.

AU - Burghammer, M.

AU - Kolobov, A. V.

AU - Fons, P.

N1 - Funding Information: The authors acknowledge the technical support of S. Behnke, C. Stemmler. Support for this work was provided by the Deutsche Forschungsgemeinschaft (CA 664/3-1), the Deutsche Akademische Austauschdienst, and the European Synchrotron Radiation Facility (MA-1236).

PY - 2012/8/6

Y1 - 2012/8/6

N2 - 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.

AB - 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.

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JF - Applied Physics Letters

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ER -

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

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