scholarly journals Theoretical studies on optical absorption in twisted bilayer graphene under vertical electric field

2021 ◽  
Vol 0 (0) ◽  
pp. 0-0
Author(s):  
Keyword(s):  
Optical Absorption ◽  
Electric Field ◽  
Bilayer Graphene ◽  
Theoretical Studies ◽  
Vertical Electric Field ◽  
Twisted Bilayer Graphene

scholarly journals Optimization of Thermoelectric Power Factor of Bilayer Graphene by Vertical Electric Field

2021 ◽  
Vol 90 (10) ◽  
pp. 104711
Author(s):  
Hikaru Horii ◽  
Manaho Matsubara ◽  
Kenji Sasaoka ◽  
Takahiro Yamamoto ◽  
Hidetoshi Fukuyama
Keyword(s):  
Electric Field ◽  
Thermoelectric Power ◽  
Power Factor ◽  
Bilayer Graphene ◽  
Thermoelectric Power Factor ◽  
Vertical Electric Field

Twist in the Tale: Exploring the Dielectric Screening Effect in Twisted Bilayer Graphene

2022 ◽  
Vol 2 ◽  
Keyword(s):  
Electric Field ◽  
External Electric Field ◽  
Electronic States ◽  
Bilayer Graphene ◽  
Two Dimensional ◽  
Screening Effect ◽  
Dielectric Screening ◽  
Twisted Bilayer Graphene

Although the screening of an external electric field, strongly influences the electronic states of two-dimensional material stack, it is not well understood. Magnetotransport measurements of twisted double bilayer graphene uncovered the screening of atomic layers.

Novel electronic and optical properties of ultrathin silicene/arsenene heterostructures and electric field effects

2017 ◽  
Vol 19 (16) ◽  
pp. 10644-10650 ◽  
Author(s):  
Huabing Shu ◽  
Yilong Tong ◽  
Jiyuan Guo
Keyword(s):  
Optical Properties ◽  
Optical Absorption ◽  
Electric Field ◽  
Band Gap ◽  
Absorption Spectra ◽  
Optical Absorption Spectra ◽  
Electric Field Effects ◽  
Electronic And Optical Properties ◽  
Vertical Electric Field ◽  
Variable Band Gap

The variable band-gap of the Si/As heterostructure (left) and optical absorption spectra for AA-stacking under a vertical electric field (right).

scholarly journals Gate tunable optical absorption and band structure of twisted bilayer graphene

2019 ◽  
Vol 99 (24) ◽  
Author(s):  
Kwangnam Yu ◽  
Nguyen Van Luan ◽  
Taesoo Kim ◽  
Jiwon Jeon ◽  
Jiho Kim ◽  
...  
Keyword(s):  
Optical Absorption ◽  
Band Structure ◽  
Bilayer Graphene ◽  
Twisted Bilayer Graphene

scholarly journals Electric Field Induced Twisted Bilayer Graphene Infrared Plasmon Spectrum

Nanomaterials ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 2433
Author(s):  
Jizhe Song ◽  
Zhongyuan Zhang ◽  
Naixing Feng ◽  
Jingang Wang
Keyword(s):  
Electric Field ◽  
External Electric Field ◽  
Valence Band ◽  
Conduction Band ◽  
Bilayer Graphene ◽  
Physical Mechanisms ◽  
Conduction Bands ◽  
Twisted Bilayer Graphene ◽  
The Difference ◽  
Plasmon Spectrum

In this work, we investigate the role of an external electric field in modulating the spectrum and electronic structure behavior of twisted bilayer graphene (TBG) and its physical mechanisms. Through theoretical studies, it is found that the external electric field can drive the relative positions of the conduction band and valence band to some extent. The difference of electric field strength and direction can reduce the original conduction band, and through the Fermi energy level, the band is significantly influenced by the tunable electric field and also increases the density of states of the valence band passing through the Fermi level. Under these two effects, the valence and conduction bands can alternately fold, causing drastic changes in spectrum behavior. In turn, the plasmon spectrum of TBG varies from semiconductor to metal. The dielectric function of TBG can exhibit plasmon resonance in a certain range of infrared.

scholarly journals Correlation-Induced Insulating Topological Phases at Charge Neutrality in Twisted Bilayer Graphene

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Yuan Da Liao ◽  
Jian Kang ◽  
Clara N. Breiø ◽  
Xiao Yan Xu ◽  
Han-Qing Wu ◽  
...  
Keyword(s):  
Bilayer Graphene ◽  
Topological Phases ◽  
Charge Neutrality ◽  
Twisted Bilayer Graphene
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