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Time-dependent X-ray absorption spectroscopy at the Ge L3 edge is used to study the optical switching dynamics of epitaxial phase change materials grown on Si(111) membranes. Small differences between the static absorption spectra of the crystalline and laser-amorphized phase of GeTe are observed. Furthermore, a new approach for pump-probe studies on phase change materials is presented. However, no time-dependent change in the X-ray absorption > 0.1% has been detected so far. This is mainly attributed to sample deterioration at 3 kHz pump-probe rates.
Taylor & Francis
Publication date: 
2 Jan 2015

Jos E Boschker, Rui Ning Wang, Valeria Bragaglia, Paul Fons, Alessandro Giussani, Loic Le Guyader, Martin Beye, Ilie Radu, Alexander V Kolobov, Karsten Holldack, Raffaella Calarco

Biblio References: 
Volume: 88 Issue: 1 Pages: 82-89
Phase Transitions