| Studies of Physical and Chemical Properties of Two-Dimensional Hexagonal Crystals by First-Principles Calculation |
| S. Q. Wang
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| 2010
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| 发表期刊 | Journal of the Physical Society of Japan
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| ISSN | 0031-9015
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| 卷号 | 79期号:6 |
| 摘要 | In this study, we implement first-principles calculation to study the physical and chemical properties of two-dimensional (2D) hexagonal crystals. The ab initio results of the crystallographic, elastic, and electronic band-gap parameters of C, Si, Ge, BN, CN, SiN, and SiC monolayers are presented. Similarly to graphene, CN and BN are among compounds with the highest 2D elasticity. The in-plane elastic moduli of Si and Ge monolayers are relative small. C, Si, and Ge monolayers are semimetal. All the four binary 2D crystals are semiconductors with wide band gaps. Two typical 2D hexagonal lattice structures, i.e., sp(2) flat and sp(3) rumpled configurations, are classified. The orbital sp(2)-hybridization in graphene and 2D BN is verified by angular-momentum projected atomic density of state calculation. 2D SiC is basically in sp(2)-hybridization. The orbital hybridization of Si, Ge, CN, and SiN monolayers is of the sp(3)-type on the whole. In view of the structural and chemical features of these monolayers, different methods for the experimental preparation of 2D crystals are suggested. |
| 部门归属 | chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china.;wang, sq (reprint author), chinese acad sci, inst met res, shenyang natl lab mat sci, 72 wenhua rd, shenyang 110016, peoples r china
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| 关键词 | 2d Crystals
Orbital Hybridization
Elastic Moduli
First-principles
Calculation
Iii-v Compounds
Elastic-constants
Silicon-nitride
Graphene
Pseudopotentials
Membranes
Graphite
Phase
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| URL | 查看原文
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| WOS记录号 | WOS:000278513100012
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| 引用统计 |
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| 文献类型 | 期刊论文
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| 条目标识符 | http://ir.imr.ac.cn/handle/321006/31515
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| 专题 | 中国科学院金属研究所
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推荐引用方式
GB/T 7714 |
S. Q. Wang. Studies of Physical and Chemical Properties of Two-Dimensional Hexagonal Crystals by First-Principles Calculation[J]. Journal of the Physical Society of Japan,2010,79(6).
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| APA |
S. Q. Wang.(2010).Studies of Physical and Chemical Properties of Two-Dimensional Hexagonal Crystals by First-Principles Calculation.Journal of the Physical Society of Japan,79(6).
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| MLA |
S. Q. Wang."Studies of Physical and Chemical Properties of Two-Dimensional Hexagonal Crystals by First-Principles Calculation".Journal of the Physical Society of Japan 79.6(2010).
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