Document Detail


Crystal structure assessment of Ge-Sb-Te phase change nanowires.
MedLine Citation:
PMID:  23322217     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
Further improvement of phase change memory devices based on Ge-Sb-Te alloys imposes the reduction of the active cell dimensions to the nanoscale. We investigate the atomic arrangement of Ge(1)Sb(2)Te(4) and Ge(2)Sb(2)Te(5) nanowires. We identify the stacking sequence in each crystal structure by combining the direct observation by High Angle Annular Dark Field imaging and proper simulations. We find out that Ge and Sb atoms randomly share the same lattice sites, although this configuration is considered not stable according to the existing theoretical models elaborated for the bulk material.
Authors:
Enzo Rotunno; Laura Lazzarini; Massimo Longo; Vincenzo Grillo
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2013-1-16
Journal Detail:
Title:  Nanoscale     Volume:  -     ISSN:  2040-3372     ISO Abbreviation:  Nanoscale     Publication Date:  2013 Jan 
Date Detail:
Created Date:  2013-1-16     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101525249     Medline TA:  Nanoscale     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Affiliation:
IMEM-CNR, Parco Area delle Scienze 37/A, 43124 Parma, Italy. enzo.rotunno@imem.cnr.it.
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