Manipulation of dangling bonds of interfacial states coupled in GeTe-rich GeTe/Sb2Te3 superlattices

Abstract Superlattices consisting of stacked nano-sized GeTe and Sb2Te3 blocks have attracted considerable attention owing to their potential for an efficient non-melting switching mechanism, associated with complex bonding between blocks. Here, we propose possible atomic models for the superlattice...

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Autores principales:	Zhe Yang, Ming Xu, Xiaomin Cheng, Hao Tong, Xiangshui Miao
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/aec4b6c6de0544ffacd32487c6a6a8d2
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spelling	oai:doaj.org-article:aec4b6c6de0544ffacd32487c6a6a8d22021-12-02T15:04:51ZManipulation of dangling bonds of interfacial states coupled in GeTe-rich GeTe/Sb2Te3 superlattices10.1038/s41598-017-17671-w2045-2322https://doaj.org/article/aec4b6c6de0544ffacd32487c6a6a8d22017-12-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-17671-whttps://doaj.org/toc/2045-2322Abstract Superlattices consisting of stacked nano-sized GeTe and Sb2Te3 blocks have attracted considerable attention owing to their potential for an efficient non-melting switching mechanism, associated with complex bonding between blocks. Here, we propose possible atomic models for the superlattices, characterized by different interfacial bonding types. Based on interplanar distances extracted from ab initio calculations and electron diffraction measurements, we reveal possible intercalation of dangling bonds as the GeTe content in the superlattice increases. The dangling bonds were further confirmed by X-ray photoelectron spectroscopy, anisotropic temperature dependent resistivity measurements down to 2 K and magnetotransport analysis. Changes of partially coherent decoupled topological surfaces states upon dangling bonds varying contributed to the switching mechanism. Furthermore, the topological surface states controlled by changing the bonding between stacking blocks may be optimized for multi-functional applications.Zhe YangMing XuXiaomin ChengHao TongXiangshui MiaoNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-9 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Zhe Yang Ming Xu Xiaomin Cheng Hao Tong Xiangshui Miao Manipulation of dangling bonds of interfacial states coupled in GeTe-rich GeTe/Sb2Te3 superlattices
description	Abstract Superlattices consisting of stacked nano-sized GeTe and Sb2Te3 blocks have attracted considerable attention owing to their potential for an efficient non-melting switching mechanism, associated with complex bonding between blocks. Here, we propose possible atomic models for the superlattices, characterized by different interfacial bonding types. Based on interplanar distances extracted from ab initio calculations and electron diffraction measurements, we reveal possible intercalation of dangling bonds as the GeTe content in the superlattice increases. The dangling bonds were further confirmed by X-ray photoelectron spectroscopy, anisotropic temperature dependent resistivity measurements down to 2 K and magnetotransport analysis. Changes of partially coherent decoupled topological surfaces states upon dangling bonds varying contributed to the switching mechanism. Furthermore, the topological surface states controlled by changing the bonding between stacking blocks may be optimized for multi-functional applications.
format	article
author	Zhe Yang Ming Xu Xiaomin Cheng Hao Tong Xiangshui Miao
author_facet	Zhe Yang Ming Xu Xiaomin Cheng Hao Tong Xiangshui Miao
author_sort	Zhe Yang
title	Manipulation of dangling bonds of interfacial states coupled in GeTe-rich GeTe/Sb2Te3 superlattices
title_short	Manipulation of dangling bonds of interfacial states coupled in GeTe-rich GeTe/Sb2Te3 superlattices
title_full	Manipulation of dangling bonds of interfacial states coupled in GeTe-rich GeTe/Sb2Te3 superlattices
title_fullStr	Manipulation of dangling bonds of interfacial states coupled in GeTe-rich GeTe/Sb2Te3 superlattices
title_full_unstemmed	Manipulation of dangling bonds of interfacial states coupled in GeTe-rich GeTe/Sb2Te3 superlattices
title_sort	manipulation of dangling bonds of interfacial states coupled in gete-rich gete/sb2te3 superlattices
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/aec4b6c6de0544ffacd32487c6a6a8d2
work_keys_str_mv	AT zheyang manipulationofdanglingbondsofinterfacialstatescoupledingeterichgetesb2te3superlattices AT mingxu manipulationofdanglingbondsofinterfacialstatescoupledingeterichgetesb2te3superlattices AT xiaomincheng manipulationofdanglingbondsofinterfacialstatescoupledingeterichgetesb2te3superlattices AT haotong manipulationofdanglingbondsofinterfacialstatescoupledingeterichgetesb2te3superlattices AT xiangshuimiao manipulationofdanglingbondsofinterfacialstatescoupledingeterichgetesb2te3superlattices
_version_	1718389035428216832

Manipulation of dangling bonds of interfacial states coupled in GeTe-rich GeTe/Sb2Te3 superlattices

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