Investigation of the structural transformation behavior of Ge2Sb2Te5 thin films using high resolution electron microscopy
- Authors
- Kim, Eun Tae; Lee, Jeong Yong; Kim, Yong Tae
- Issue Date
- 2007-09-03
- Publisher
- AMER INST PHYSICS
- Citation
- APPLIED PHYSICS LETTERS, v.91, no.10
- Abstract
- Structural transformation of the Ge2Sb2Te5 was investigated by a high resolution transmission electron microscopy (HRTEM). It was found that Ge atoms undergo umbrella-flip motion from a tetrahedral site into an octahedral site in transforming from the amorphous to the metastable phase of Ge2Sb2Te5. The presence of a twin boundary between fcc and hexagonal structured Ge2Sb2Te5 was also confirmed through the HRTEM observations. These results support the umbrella-flip model proposed by Kolobov [Nat. Mater. 3, 703 (2004)] and the epitaxial growth model proposed by Park [Appl. Surf. Sci. 256, 8102 (2006)]. (c) 2007 American Institute of Physics.
- Keywords
- CRYSTAL-STRUCTURE; CRYSTAL-STRUCTURE
- ISSN
- 0003-6951
- URI
- https://pubs.kist.re.kr/handle/201004/134112
- DOI
- 10.1063/1.2783478
- Appears in Collections:
- KIST Article > 2007
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