2022
DOI: 10.3390/nano12101717
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Phase Separation in Ge-Rich GeSbTe at Different Length Scales: Melt-Quenched Bulk versus Annealed Thin Films

Abstract: Integration of the prototypical GeSbTe (GST) ternary alloys, especially on the GeTe-Sb2Te3 tie-line, into non-volatile memory and nanophotonic devices is a relatively mature field of study. Nevertheless, the search for the next best active material with outstanding properties is still ongoing. This search is relatively crucial for embedded memory applications where the crystallization temperature of the active material has to be higher to surpass the soldering threshold. Increasing the Ge content in the GST al… Show more

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Cited by 7 publications
(6 citation statements)
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“…The alloy compositions and the observed phase separation pathways reported in [ 4 , 6 ] agree to a large extent with the theoretical results from the density functional theory calculations, as presented in [ 8 ], where O. Abou El Kheir and M. Bernasconi perform high-throughput calculations to uncover the most favorable decomposition pathways of Ge-rich GST alloys. They also construct a map of decomposition propensity, suggesting a possible strategy to minimize phase separation while still maintaining a high crystallization temperature.…”
supporting
confidence: 81%
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“…The alloy compositions and the observed phase separation pathways reported in [ 4 , 6 ] agree to a large extent with the theoretical results from the density functional theory calculations, as presented in [ 8 ], where O. Abou El Kheir and M. Bernasconi perform high-throughput calculations to uncover the most favorable decomposition pathways of Ge-rich GST alloys. They also construct a map of decomposition propensity, suggesting a possible strategy to minimize phase separation while still maintaining a high crystallization temperature.…”
supporting
confidence: 81%
“…Five articles of this Special Issue focus on Ge-rich GST alloys, exploring their electronic and electrical properties [ 4 , 5 , 6 , 7 ] as well as decomposition pathways, including from a theoretical point of view [ 8 ].…”
mentioning
confidence: 99%
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“…Several authors have already used dynamic ellipsometry to establish the crystallization temperature of several PCMs such as Sb [42], Sb 2 Te 3 or Ge 2 Sb 2 Te 5 [43]. To illustrate this procedure, and as an example, Fig.…”
Section: Temperature Dependent Dynamic Ellipsometry To Monitor Crysta...mentioning
confidence: 99%
“…5 shows a scheme of this technique and recent results of its application to the observation of transient effects in crystalline PCM thin film. A wide range of events happens during light-induced phase transitions of PCM between time scales from 0.1 -100 ps [42][43][44][45][46][47][48][49][50][51][52][53][54] and time-resolved ellipsometry in complement with ultrafast structural methods are ideal tools for probing these dynamics.…”
Section: Ultrafast Femtosecond Pump-probe Spectroscopic Ellipsometrymentioning
confidence: 99%