Determination of the atomic stacking sequence of Ge-Sb-Te nanowires by HAADF STEM (Comunicazione a convegno)

Type
Label
  • Determination of the atomic stacking sequence of Ge-Sb-Te nanowires by HAADF STEM (Comunicazione a convegno) (literal)
Anno
  • 2013-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1557/opl.2012.1746 (literal)
Alternative label
  • Laura Lazzarini, Enzo Rotunno, Vincenzo Grillo, Massimo Longo (2013)
    Determination of the atomic stacking sequence of Ge-Sb-Te nanowires by HAADF STEM
    in MRS Fall Meeting, Boston
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Laura Lazzarini, Enzo Rotunno, Vincenzo Grillo, Massimo Longo (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#url
  • http://journals.cambridge.org/article_S1946427412017460 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#titoloVolume
  • Symposium FF - Semiconductor Nanowires--Optical and Electronic Characterization and Applications (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#volumeInCollana
  • 1512 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • CNR-IMEM, Parco area delle Scienze 37/A, 43124 Parma, Italy. CNR-Center S3 Nano, Modena, Italy. CNR-IMM, MDM Lab, via C. Olivetti 2, Agrate Brianza, Italy (literal)
Titolo
  • Determination of the atomic stacking sequence of Ge-Sb-Te nanowires by HAADF STEM (literal)
Abstract
  • The reduction of the active cell size to the nanoscale is crucial for the improvement of the phase change memory devices (PCM) based on Ge-Sb-Te (GST) alloys. The self-assembly of Au catalyzed Ge1Sb2Te4 (GST-124) nanowires (NWs) has been achieved by metal organic chemical vapor deposition. The atomic arrangement of the NWs has been investigated and the stacking sequence has been identified, by combining the direct observation by High Angle Annular Dark Field (HAADF) imaging and simulations. It has been assessed that Ge and Sb atoms can randomly occupy the same sites in the crystal lattice, despite the adverse predictions of the theoretical models elaborated for the bulk material. (literal)
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