The Dirac Cone in Two-Dimensional Tetragonal Silicon Carbide：Ring Coupling Mechanism

Nanoscale ◽  
2021 ◽  
Author(s):  
Weixiang Kong ◽  
Xiaoliang Xiao ◽  
wangping wang xu ◽  
Rui Wang ◽  
Li-Yong Gan ◽  
...  
Keyword(s):  
Silicon Carbide ◽  
Band Structure ◽  
Coupling Mechanism ◽  
Two Dimensional ◽  
Dirac Cone ◽  
Tetragonal Lattice

The exploration of novel two-Dimensional semimetallic materials is always an attractive topic. We propose a series of two-dimensional silicon carbide with a tetragonal lattice. The band structure of silicon carbide...

Mirror symmetry origin of Dirac cone formation in rectangular two-dimensional materials

2020 ◽  
Vol 22 (12) ◽  
pp. 6619-6625 ◽  
Author(s):  
Xuming Qin ◽  
Yi Liu ◽  
Gui Yang ◽  
Dongqiu Zhao
Keyword(s):  
Band Structure ◽  
Mirror Symmetry ◽  
Density Functional ◽  
Tight Binding ◽  
Coupling Mechanism ◽  
Two Dimensional ◽  
Dirac Cone ◽  
Two Dimensional Materials ◽  
Tight Binding Method ◽  
Cone Formation

The origin of Dirac cone band structure of 6,6,12-graphyne is revealed by a “mirror symmetry parity coupling” mechanism proposed with tight-binding method combined with density functional calculations.

scholarly journals New stable two dimensional silicon carbide nanosheets

2021 ◽  
Vol 868 ◽  
pp. 159201
Author(s):  
Qun Wei ◽  
Ying Yang ◽  
Guang Yang ◽  
Xihong Peng
Keyword(s):  
Silicon Carbide ◽  
Two Dimensional

Two-Dimensional Honeycomb B2Se with Orthogonal Lattice: High Stability and Strong Anisotropic Dirac Cone

2020 ◽  
Vol 124 (13) ◽  
pp. 7558-7565 ◽  
Author(s):  
Ji-kai Lyu ◽  
Wei-xiao Ji ◽  
Shu-feng Zhang ◽  
Chang-wen Zhang ◽  
Pei-ji Wang
Keyword(s):  
High Stability ◽  
Two Dimensional ◽  
Dirac Cone

Phonon Coupling and Dielectric Response in 2D Semiconductor

NANO ◽  
2021 ◽  
Author(s):  
Arslan Usman ◽  
Abdul Sattar ◽  
Hamid Latif ◽  
Muhammad Imran
Keyword(s):  
Transition Metal Dichalcogenides ◽  
Coupling Mechanism ◽  
Two Dimensional ◽  
Electron Hole ◽  
Exciton Coupling ◽  
Gain Energy ◽  
Metal Dichalcogenides ◽  
Layered Transition Metal ◽  
The Impact

The impact of phonon and their surrounding environment on exciton and its complexes were investigated in monolayer WSe2 semiconductor. Phonon up-conversion has been studied in past for conventional III–V semiconductors, but its role in two-dimensional layered transition metal dichalcogenides has rarely been explored. We investigated the photoluminescence up-conversion mechanism in WSe2 monolayer and found that a lower energy photon gain energy upto 64[Formula: see text]meV to be up-converted to emission photon at room temperature. Moreover, the phonon-exciton coupling mechanism has also been investigated and the role of dielectric screening has been explored to get complete insight of coulomb’s interaction in these electron-hole pairs. Investigations of charge carrier’s lifetime reveal that boron nitride encapsulated monolayer has shorter recombination time as low as 41 ps as compared to a bare monolayer on SiO2 substrate. These results are very promising for realizing spintronics-based application from two-dimensional layered semiconductors.

Effect of the Dirac-cone tilt on the disorder-broadened Landau levels in a two-dimensional Dirac nodal system

2021 ◽  
Vol 104 (23) ◽  
Author(s):  
Haibo Yao ◽  
Mingfeng Zhu ◽  
Liwei Jiang ◽  
Yisong Zheng
Keyword(s):  
Landau Levels ◽  
Two Dimensional ◽  
Dirac Cone ◽  
Nodal System
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