Temperature dependence of two-dimensional structural evolution of monocrystalline 6H-SiC with vacancy and processing defects

IF 5.6 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS Ceramics International Pub Date : 2025-03-01 Epub Date: 2024-12-24 DOI:10.1016/j.ceramint.2024.12.351

Piao Zhou, Chi Fai Cheung

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Abstract

Two-dimensional silicon carbide has potential application in electronics and photonics fields due to its unique properties. The evolution characteristics of the two-dimensional structure in silicon carbide substrates with different external temperature has not been reported. The influence of vacancy defects and processing defects on the formation of two-dimensional structures are investigated. The two-dimensional structural evolution, coordination numbers, bond lengths and bond angles features, are mainly discussed. Investigation results show that the 6H-SiC has excellent thermal stability. Honeycomb layered two-dimensional structures with one atomic layered thickness is formed in 6H-SiC with extremely high temperature at 3500 K. The two-dimensional layered structure is originated from Si-C bilayer in 6H-SiC. The presence of vacancy and processing defects inhibits the two-dimensional structural transition of 6H-SiC. Our investigations would provide valuable insights into the preparation of two-dimensional SiC.

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含空位和加工缺陷的单晶6H-SiC二维结构演化的温度依赖性

二维碳化硅以其独特的性能在电子和光子学领域具有潜在的应用前景。碳化硅衬底中二维结构在不同外部温度下的演化特征尚未见报道。研究了空位缺陷和加工缺陷对二维结构形成的影响。主要讨论了二维结构演化、配位数、键长和键角特征。研究结果表明，6H-SiC具有优异的热稳定性。在3500k的高温下，在6H-SiC中形成了单原子层状厚度的蜂窝状二维层状结构。二维层状结构来源于6H-SiC中的Si-C双分子层。空位和加工缺陷的存在抑制了6H-SiC的二维结构转变。我们的研究将为二维碳化硅的制备提供有价值的见解。

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来源期刊

Ceramics International 工程技术-材料科学：硅酸盐

CiteScore

9.40

自引率

15.40%

发文量

4558

审稿时长

25 days

期刊介绍： Ceramics International covers the science of advanced ceramic materials. The journal encourages contributions that demonstrate how an understanding of the basic chemical and physical phenomena may direct materials design and stimulate ideas for new or improved processing techniques, in order to obtain materials with desired structural features and properties. Ceramics International covers oxide and non-oxide ceramics, functional glasses, glass ceramics, amorphous inorganic non-metallic materials (and their combinations with metal and organic materials), in the form of particulates, dense or porous bodies, thin/thick films and laminated, graded and composite structures. Process related topics such as ceramic-ceramic joints or joining ceramics with dissimilar materials, as well as surface finishing and conditioning are also covered. Besides traditional processing techniques, manufacturing routes of interest include innovative procedures benefiting from externally applied stresses, electromagnetic fields and energetic beams, as well as top-down and self-assembly nanotechnology approaches. In addition, the journal welcomes submissions on bio-inspired and bio-enabled materials designs, experimentally validated multi scale modelling and simulation for materials design, and the use of the most advanced chemical and physical characterization techniques of structure, properties and behaviour. Technologically relevant low-dimensional systems are a particular focus of Ceramics International. These include 0, 1 and 2-D nanomaterials (also covering CNTs, graphene and related materials, and diamond-like carbons), their nanocomposites, as well as nano-hybrids and hierarchical multifunctional nanostructures that might integrate molecular, biological and electronic components.