Imperial College London
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ProfessorBaptisteGault

Faculty of Engineering, Department of Materials

Professor of Atomic-Scale Characterization
 
 
 
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Contact

 

b.gault

 
 
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Location

 

Royal School of MinesSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Zhu:2019:10.1038/s41467-019-11506-0,
author = {Zhu, M and Song, W and Konze, PM and Li, T and Gault, B and Chen, X and Shen, J and Lv, S and Song, Z and Wuttig, M and Dronskowski, R},
doi = {10.1038/s41467-019-11506-0},
journal = {Nature Communications},
pages = {1--10},
title = {Direct atomic insight into the role of dopants in phase-change materials},
url = {http://dx.doi.org/10.1038/s41467-019-11506-0},
volume = {10},
year = {2019}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Doping is indispensable to tailor phase-change materials (PCM) in optical and electronic data storage. Very few experimental studies, however, have provided quantitative information on the distribution of dopants on the atomic-scale. Here, we present atom-resolved images of Ag and In dopants in Sb2Te-based (AIST) PCM using electron microscopy and atom-probe tomography. Combing these with DFT calculations and chemical-bonding analysis, we unambiguously determine the dopants’ role upon recrystallization. Composition profiles corroborate the substitution of Sb by In and Ag, and the segregation of excessive Ag into grain boundaries. While In is bonded covalently to neighboring Te, Ag binds ionically. Moreover, In doping accelerates the crystallization and hence operation while Ag doping limits the random diffusion of In atoms and enhances the thermal stability of the amorphous phase.
AU  - Zhu,M
AU  - Song,W
AU  - Konze,PM
AU  - Li,T
AU  - Gault,B
AU  - Chen,X
AU  - Shen,J
AU  - Lv,S
AU  - Song,Z
AU  - Wuttig,M
AU  - Dronskowski,R
DO  - 10.1038/s41467-019-11506-0
EP  - 10
PY  - 2019///
SN  - 2041-1723
SP  - 1
TI  - Direct atomic insight into the role of dopants in phase-change materials
T2  - Nature Communications
UR  - http://dx.doi.org/10.1038/s41467-019-11506-0
UR  - https://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000478867500010&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
UR  - https://www.nature.com/articles/s41467-019-11506-0
UR  - http://hdl.handle.net/10044/1/104345
VL  - 10
ER  -
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