The Dirac cone in two-dimensional tetragonal silicon carbides: A ring coupling mechanism

Kong，Weixiang1; Xiao，Xiaoliang1; Xu，Wangping1; Wang，Rui1; Gan，Li Yong1; Wei，Juan1; Fan，Jing2; Wu，Xiaozhi1

2021-11-21

10.1039/d1nr04586e

Nanoscale   影响因子和分区

2040-3364

2040-3372

The exploration of novel two-dimensional semimetallic materials is always an attractive topic. We propose a series of two-dimensional silicon carbides with a tetragonal lattice. The band structure of silicon carbides with tetragonal carbon rings and silicon rings exhibits Dirac cones. Interestingly, the Dirac cone of tetragonal SiC originates from a "ring coupling"mechanism. This mechanism refers to the mutual coupling between the four carbon atoms in the tetragonal C ring, and the same coupling in the tetragonal Si ring. Additionally, the "ring coupling"mechanism is applicable to other group IV binary compounds such as monolayer GeC and SnC. This work provides reliable evidence for the argument that two-dimensional tetragonal materials can produce Dirac cones.

SCI ; EI

英语

其他

WOS:000712539800001

20214711199637

Carbon ; Germanium compounds ; Monolayers ; Tin compounds

Chemical Products Generally:804 ; Inorganic Compounds:804.2

2-s2.0-85119365797

Scopus

1.Department of Physics,Chongqing University,Chongqing,401331,China
2.Center for Computational Science and Engineering,Southern University of Science and Technology,Shenzhen,518055,China

Kong，Weixiang,Xiao，Xiaoliang,Xu，Wangping,et al. The Dirac cone in two-dimensional tetragonal silicon carbides: A ring coupling mechanism[J]. Nanoscale,2021,13(43):18267-18272.

Kong，Weixiang.,Xiao，Xiaoliang.,Xu，Wangping.,Wang，Rui.,Gan，Li Yong.,...&Wu，Xiaozhi.(2021).The Dirac cone in two-dimensional tetragonal silicon carbides: A ring coupling mechanism.Nanoscale,13(43),18267-18272.

Kong，Weixiang,et al."The Dirac cone in two-dimensional tetragonal silicon carbides: A ring coupling mechanism".Nanoscale 13.43(2021):18267-18272.