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Get Free AccessThe question of the nature and stability of polar ordering in nanoscale ferroelectrics is examined with colloidal nanocrystals of germanium telluride (GeTe). We provide atomic-scale evidence for room-temperature polar ordering in individual nanocrystals using aberration-corrected transmission electron microscopy and demonstrate a reversible, size-dependent polar-nonpolar phase transition of displacive character in nanocrystal ensembles. A substantial linear component of the distortion is observed, which is in contrast with theoretical reports predicting a toroidal state.
Mark J. Polking, Jeffrey J. Urban, Delia J. Milliron, Haimei Zheng, Emory M. Chan, Marissa A. Caldwell, Simone Raoux, Christian Kisielowski, Joel W. Ager, R. Ramesh, Paul Alivisatos (2011). Size-Dependent Polar Ordering in Colloidal GeTe Nanocrystals. , 11(3), DOI: https://doi.org/10.1021/nl104075v.
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Type
Article
Year
2011
Authors
11
Datasets
0
Total Files
0
Language
en
DOI
https://doi.org/10.1021/nl104075v
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