scholarly journals Electronic band structure and pinning of Fermi energy to Van Hove singularities in twisted bilayer graphene: A self-consistent approach

2019 ◽  
Vol 100 (20) ◽  
Author(s):  
Tommaso Cea ◽  
Niels R. Walet ◽  
Francisco Guinea
Keyword(s):  
Band Structure ◽  
Fermi Energy ◽  
Electronic Band Structure ◽  
Bilayer Graphene ◽  
Electronic Band ◽  
Van Hove Singularities ◽  
Self Consistent ◽  
Twisted Bilayer Graphene ◽  
Consistent Approach

scholarly journals Evolution of the electronic band structure of twisted bilayer graphene upon doping

2017 ◽  
Vol 7 (1) ◽  
Author(s):  
Shengqiang Huang ◽  
Matthew Yankowitz ◽  
Kanokporn Chattrakun ◽  
Arvinder Sandhu ◽  
Brian J. LeRoy
Keyword(s):  
Band Structure ◽  
Electronic Band Structure ◽  
Bilayer Graphene ◽  
Electronic Band ◽  
Twisted Bilayer Graphene

scholarly journals Electronic band structure of magnetic bilayer graphene superlattices

2014 ◽  
Vol 116 (12) ◽  
pp. 123707 ◽  
Author(s):  
C. Huy Pham ◽  
T. Thuong Nguyen ◽  
V. Lien Nguyen
Keyword(s):  
Band Structure ◽  
Electronic Band Structure ◽  
Bilayer Graphene ◽  
Electronic Band

scholarly journals Self-consistent electronic-band-structure calculation forHg3AsF6

1985 ◽  
Vol 31 (5) ◽  
pp. 2881-2885 ◽  
Author(s):  
R. A. de Groot ◽  
J. J. M. Buiting ◽  
M. Weger ◽  
F. M. Mueller
Keyword(s):  
Band Structure ◽  
Electronic Band Structure ◽  
Structure Calculation ◽  
Band Structure Calculation ◽  
Electronic Band ◽  
Self Consistent

scholarly journals Angle-tunable intersubband photoabsorption and enhanced photobleaching in twisted bilayer graphene

Nano Research ◽  
2021 ◽  
Author(s):  
Eva A. A. Pogna ◽  
Xianchong Miao ◽  
Driele von Dreifus ◽  
Thonimar V. Alencar ◽  
Marcus V. O. Moutinho ◽  
...  
Keyword(s):  
Electronic Band Structure ◽  
Twist Angle ◽  
Interlayer Coupling ◽  
Bilayer Graphene ◽  
Relaxation Dynamics ◽  
Carrier Distribution ◽  
Absorption Bands ◽  
Electronic Band ◽  
Angle Dependence ◽  
Twisted Bilayer Graphene

AbstractVan der Waals heterostructures obtained by artificially stacking two-dimensional crystals represent the frontier of material engineering, demonstrating properties superior to those of the starting materials. Fine control of the interlayer twist angle has opened new possibilities for tailoring the optoelectronic properties of these heterostructures. Twisted bilayer graphene with a strong interlayer coupling is a prototype of twisted heterostructure inheriting the intriguing electronic properties of graphene. Understanding the effects of the twist angle on its out-of-equilibrium optical properties is crucial for devising optoelectronic applications. With this aim, we here combine excitation-resolved hot photoluminescence with femtosecond transient absorption microscopy. The hot charge carrier distribution induced by photo-excitation results in peaked absorption bleaching and photo-induced absorption bands, both with pronounced twist angle dependence. Theoretical simulations of the electronic band structure and of the joint density of states enable to assign these bands to the blocking of interband transitions at the van Hove singularities and to photo-activated intersubband transitions. The tens of picoseconds relaxation dynamics of the observed bands is attributed to the angle-dependence of electron and phonon heat capacities of twisted bilayer graphene.

Sign in / Sign up

Export Citation Format

Share Document