ÖPG-CMD Joint Meeting 2026

Reconstructive phase transitions in a-GeSbTe and a-GeTe compounds

Sep 24, 2026, 11:30 AM

30m

HS 15.03 (University of Graz)

4) Invited talk M05 - Transport in low-dimensional strongly correlated quantum systems Mini-Colloquium

Speaker

Zvi Ovadyahu (Racah Institute of Physics, The Hebrew University Jerusalem ISRAEL)

Description

Films of amorphous GeSbTe and GeTe exhibit nonequilibrium transport anomalies when subjected to thermal cycling. These presumably reflect iso-thermal structural changes. Some of these temperature-driven changes are reversible, suggestive of a phase-transition occurring at the amorphous phase. Noise measurements are consistent with this picture while revealing a qualitative difference between the two compounds.