scholarly journals Exact continuum model for low-energy electronic states of twisted bilayer graphene

2019 ◽  
Vol 1 (1) ◽  
Author(s):  
Stephen Carr ◽  
Shiang Fang ◽  
Ziyan Zhu ◽  
Efthimios Kaxiras
Keyword(s):  
Continuum Model ◽  
Electronic States ◽  
Bilayer Graphene ◽  
Low Energy ◽  
Twisted Bilayer Graphene

scholarly journals Moiré with flat bands is different

2019 ◽  
Vol 50 (3) ◽  
pp. 24-26
Author(s):  
Tero T. Heikkilä ◽  
Timo Hyart
Keyword(s):  
Critical Temperature ◽  
Fermi Surface ◽  
Room Temperature ◽  
Electronic States ◽  
Bilayer Graphene ◽  
Flat Bands ◽  
Twisted Bilayer Graphene

Recent experimental discoveries of superconductivity and other exotic electronic states in twisted bilayer graphene (TBG) call for a reconsideration of our traditional theories of these states, usually based on the assumption of the presence of a Fermi surface. Here we show how such developments may even help us finding mechanisms of increasing the critical temperature of superconductivity towards the room temperature.

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.

scholarly journals General continuum model for twisted bilayer graphene and arbitrary smooth deformations

2019 ◽  
Vol 7 (4) ◽  
Author(s):  
Leon Balents
Keyword(s):  
Continuum Model ◽  
Bilayer Graphene ◽  
Real Space ◽  
Lattice Deformation ◽  
Displacement Fields ◽  
Simple Derivation ◽  
Twisted Bilayer Graphene ◽  
General Continuum ◽  
The Continuum

We present a simple derivation of a continuum Hamiltonian for bilayer graphene with an arbitrary smooth lattice deformation – technically in a fashion parametrized by displacement fields with small gradients. We show that this subsumes the continuum model of Bistritzer and Macdonald for twisted bilayer graphene as well as many generalizations and extensions of it. The derivation is carried out entirely in real space.

scholarly journals Twisted Bilayer Graphene: Low‐Energy Physics, Electronic and Optical Properties

2019 ◽  
pp. 177-231 ◽  
Author(s):  
Gonçalo Catarina ◽  
Bruno Amorim ◽  
Eduardo V. Castro ◽  
Eduardo V. Castro ◽  
Eduardo V. Castro ◽  
...  
Keyword(s):  
Optical Properties ◽  
Bilayer Graphene ◽  
Low Energy ◽  
Electronic And Optical Properties ◽  
Twisted Bilayer Graphene ◽  
Energy Physics

scholarly journals Structural relaxation and low-energy properties of twisted bilayer graphene

2020 ◽  
Vol 2 (4) ◽  
Author(s):  
Giovanni Cantele ◽  
Dario Alfè ◽  
Felice Conte ◽  
Vittorio Cataudella ◽  
Domenico Ninno ◽  
...  
Keyword(s):  
Structural Relaxation ◽  
Bilayer Graphene ◽  
Low Energy ◽  
Twisted Bilayer Graphene
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