Understanding the early cycling evolution behaviors for phase change memory application

The RESET current of T-shaped phase change memory cells with 35 nm heating electrodes has been studied to understand the behavior of early cycling evolution. Results show that the RESET current has been significantly reduced after the early cycling evolution (1st RESET) operation. Compared the trans...

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Bibliographic Details
Published in:Journal of applied physics 2014-11, Vol.116 (20)
Main Authors: Wang, Yuchan, Chen, Yifeng, Cai, Daolin, Cheng, Yan, Chen, Xiaogang, Wang, Yueqing, Xia, Mengjiao, Zhou, Mi, Li, Gezi, Zhang, Yiyun, Gao, Dan, Song, Zhitang, Feng, Gaoming
Format: Article
Language:English
Subjects:
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
Computer memory
CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
Crystal structure
CRYSTALS
Cycles
ELECTRODES
EVOLUTION
FCC LATTICES
Grains
HEATING
Image transmission
Microscopes
Phase change
Phase transitions
T shape
TRANSMISSION ELECTRON MICROSCOPY
Two dimensional analysis
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Summary:The RESET current of T-shaped phase change memory cells with 35 nm heating electrodes has been studied to understand the behavior of early cycling evolution. Results show that the RESET current has been significantly reduced after the early cycling evolution (1st RESET) operation. Compared the transmission electron microscope images, it is found that the hexagonal Ge2Sb2Te5 (GST) crystal grains are changed into the grains with face centered cubic structure after the early cycling evolution operation, which is taken as the major reason for the reduced RESET current, confirmed by a two-dimensional finite analysis and ab initio calculations.
ISSN:0021-8979
1089-7550
DOI:10.1063/1.4902851