Dirac Fermions in the Boron Nitride Monolayer with a Tetragon

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

2022-06-23

10.1021/acs.jpclett.2c01087

Journal of Physical Chemistry Letters   影响因子和分区

1948-7185

1948-7185

Two-dimensional (2D) boron nitride (BN) is a promising candidate for aerospace materials due to its excellent mechanical and thermal stability properties. However, its unusually prominent band gap limits its application prospects. In this work, we report a gapless monolayer BN, t-BN, which has four anisotropic Dirac cones in the first Brillouin zone exactly at the Fermi level. To further confirm the semimetallic character, the nontrivial topological properties are proven through the topologically protected edge states and the invariant non-zero Z2. Additionally, the Young's modulus and Poisson ratio characterize the strong mechanical strength of t-BN. Our theoretical predictions provide more possibilities for exploring the Dirac cone in BN, which will enhance the 2D boron derivative materials.

SCI ; EI

英语

NI论文

其他

Natural Science Foundation of China[12174040] ; Chongqing Natural Science Foundation[cstc2020jcyj-msxmX0 1 1 8]

Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics

Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Atomic, Molecular & Chemical

WOS:000817959100001

AMER CHEMICAL SOC

20223012412299

Elastic moduli ; Energy gap ; III-V semiconductors ; Monolayers ; Nitrides ; Stability ; Topology

Semiconducting Materials:712.1 ; Inorganic Compounds:804.2 ; Combinatorial Mathematics, Includes Graph Theory, Set Theory:921.4 ; Materials Science:951

2-s2.0-85133100540

Scopus

1.Institute for Structure and Function and Department of Physics,Chongqing University,400044,China
2.Center for Computational Science and Engineering,Southern University of Science and Technology,Shenzhen,518055,China

Wei，Juan,Kong，Weixiang,Xiao，Xiaoliang,et al. Dirac Fermions in the Boron Nitride Monolayer with a Tetragon[J]. Journal of Physical Chemistry Letters,2022,13(24):5508-5513.

Wei，Juan.,Kong，Weixiang.,Xiao，Xiaoliang.,Wang，Rui.,Gan，Li Yong.,...&Wu，Xiaozhi.(2022).Dirac Fermions in the Boron Nitride Monolayer with a Tetragon.Journal of Physical Chemistry Letters,13(24),5508-5513.

Wei，Juan,et al."Dirac Fermions in the Boron Nitride Monolayer with a Tetragon".Journal of Physical Chemistry Letters 13.24(2022):5508-5513.