Dimensional transformation of chemical bonding during crystallization in a layered chalcogenide material

Abstract Two-dimensional (2D) van der Waals (vdW) materials possess a crystal structure in which a covalently-bonded few atomic-layer motif forms a single unit with individual motifs being weakly bound to each other by vdW forces. Cr2Ge2Te6 is known as a 2D vdW ferromagnetic insulator as well as a p...

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Autores principales:	Yuta Saito, Shogo Hatayama, Yi Shuang, Paul Fons, Alexander V. Kolobov, Yuji Sutou
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/da5c5371c0ba47d7882adc456303576c
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spelling	oai:doaj.org-article:da5c5371c0ba47d7882adc456303576c2021-12-02T13:19:31ZDimensional transformation of chemical bonding during crystallization in a layered chalcogenide material10.1038/s41598-020-80301-52045-2322https://doaj.org/article/da5c5371c0ba47d7882adc456303576c2021-03-01T00:00:00Zhttps://doi.org/10.1038/s41598-020-80301-5https://doaj.org/toc/2045-2322Abstract Two-dimensional (2D) van der Waals (vdW) materials possess a crystal structure in which a covalently-bonded few atomic-layer motif forms a single unit with individual motifs being weakly bound to each other by vdW forces. Cr2Ge2Te6 is known as a 2D vdW ferromagnetic insulator as well as a potential phase change material for non-volatile memory applications. Here, we provide evidence for a dimensional transformation in the chemical bonding from a randomly bonded three-dimensional (3D) disordered amorphous phase to a 2D bonded vdW crystalline phase. A counterintuitive metastable “quasi-layered” state during crystallization that exhibits both “long-range order and short-range disorder” with respect to atomic alignment clearly distinguishes the system from conventional materials. This unusual behavior is thought to originate from the 2D nature of the crystalline phase. These observations provide insight into the crystallization mechanism of layered materials in general, and consequently, will be useful for the realization of 2D vdW material-based functional nanoelectronic device applications.Yuta SaitoShogo HatayamaYi ShuangPaul FonsAlexander V. KolobovYuji SutouNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-9 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Yuta Saito Shogo Hatayama Yi Shuang Paul Fons Alexander V. Kolobov Yuji Sutou Dimensional transformation of chemical bonding during crystallization in a layered chalcogenide material
description	Abstract Two-dimensional (2D) van der Waals (vdW) materials possess a crystal structure in which a covalently-bonded few atomic-layer motif forms a single unit with individual motifs being weakly bound to each other by vdW forces. Cr2Ge2Te6 is known as a 2D vdW ferromagnetic insulator as well as a potential phase change material for non-volatile memory applications. Here, we provide evidence for a dimensional transformation in the chemical bonding from a randomly bonded three-dimensional (3D) disordered amorphous phase to a 2D bonded vdW crystalline phase. A counterintuitive metastable “quasi-layered” state during crystallization that exhibits both “long-range order and short-range disorder” with respect to atomic alignment clearly distinguishes the system from conventional materials. This unusual behavior is thought to originate from the 2D nature of the crystalline phase. These observations provide insight into the crystallization mechanism of layered materials in general, and consequently, will be useful for the realization of 2D vdW material-based functional nanoelectronic device applications.
format	article
author	Yuta Saito Shogo Hatayama Yi Shuang Paul Fons Alexander V. Kolobov Yuji Sutou
author_facet	Yuta Saito Shogo Hatayama Yi Shuang Paul Fons Alexander V. Kolobov Yuji Sutou
author_sort	Yuta Saito
title	Dimensional transformation of chemical bonding during crystallization in a layered chalcogenide material
title_short	Dimensional transformation of chemical bonding during crystallization in a layered chalcogenide material
title_full	Dimensional transformation of chemical bonding during crystallization in a layered chalcogenide material
title_fullStr	Dimensional transformation of chemical bonding during crystallization in a layered chalcogenide material
title_full_unstemmed	Dimensional transformation of chemical bonding during crystallization in a layered chalcogenide material
title_sort	dimensional transformation of chemical bonding during crystallization in a layered chalcogenide material
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/da5c5371c0ba47d7882adc456303576c
work_keys_str_mv	AT yutasaito dimensionaltransformationofchemicalbondingduringcrystallizationinalayeredchalcogenidematerial AT shogohatayama dimensionaltransformationofchemicalbondingduringcrystallizationinalayeredchalcogenidematerial AT yishuang dimensionaltransformationofchemicalbondingduringcrystallizationinalayeredchalcogenidematerial AT paulfons dimensionaltransformationofchemicalbondingduringcrystallizationinalayeredchalcogenidematerial AT alexandervkolobov dimensionaltransformationofchemicalbondingduringcrystallizationinalayeredchalcogenidematerial AT yujisutou dimensionaltransformationofchemicalbondingduringcrystallizationinalayeredchalcogenidematerial
_version_	1718393299450986496

Dimensional transformation of chemical bonding during crystallization in a layered chalcogenide material

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