期刊
JOURNAL OF NON-CRYSTALLINE SOLIDS
卷 354, 期 19-25, 页码 2728-2731出版社
ELSEVIER
DOI: 10.1016/j.jnoncrysol.2007.10.069
关键词
conductivity; chalcogenides
Current-voltage (I-V) characteristics have been studied in as-deposited amorphous Ge2Sb2Te5 films. At low electric fields, ohmic behavior is observed. On the other hand, at high electric fields (E > 10(6) V/m) the current becomes non-ohmic. Analysis of the data shows the existence of Poole-Frenkel conduction in which In I vs V-1/2 curves are found to be straight lines. Pre-switching behaviors are also discussed from electrode configuration. (C) 2007 Elsevier B.V. All rights reserved.
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