scholarly journals Strained bilayer graphene: Band structure topology and Landau level spectrum

2011 ◽  
Vol 84 (4) ◽  
Author(s):  
Marcin Mucha-Kruczyński ◽  
Igor L. Aleiner ◽  
Vladimir I. Fal’ko
Keyword(s):  
Band Structure ◽  
Landau Level ◽  
Bilayer Graphene ◽  
Structure Topology ◽  
Level Spectrum

Landau level spectrum for bilayer graphene in a tilted magnetic field

2012 ◽  
Vol 24 (4) ◽  
pp. 045501 ◽  
Author(s):  
Young-Hwan Hyun ◽  
Yoonbai Kim ◽  
Corneliu Sochichiu ◽  
Min-Young Choi
Keyword(s):  
Magnetic Field ◽  
Landau Level ◽  
Bilayer Graphene ◽  
Level Spectrum ◽  
Tilted Magnetic Field

scholarly journals Quasiclassical calculations of Landau level spectrum for 20.5-nm-wide H gTe quantum well: “extremum loop” model and effects of cubic symmetry

2021 ◽  
Vol 47 (1) ◽  
pp. 7-13
Author(s):  
S. V. Gudina ◽  
A. S. Bogolubskiy ◽  
V. N. Neverov ◽  
K. V. Turutkin ◽  
N. G. Shelushinina ◽  
...  
Keyword(s):  
Quantum Well ◽  
Landau Level ◽  
Loop Model ◽  
Cubic Symmetry ◽  
Level Spectrum

scholarly journals Spectroscopy of a tunable moiré system with a correlated and topological flat band

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Xiaomeng Liu ◽  
Cheng-Li Chiu ◽  
Jong Yeon Lee ◽  
Gelareh Farahi ◽  
Kenji Watanabe ◽  
...  
Keyword(s):  
Band Structure ◽  
Twist Angle ◽  
Bilayer Graphene ◽  
Scanning Tunneling Spectroscopy ◽  
Scanning Tunneling ◽  
Flat Band ◽  
Correlated Electron ◽  
Partial Filling ◽  
Valley Polarization ◽  
Spectroscopic Signatures

AbstractMoiré superlattices created by the twisted stacking of two-dimensional crystals can host electronic bands with flat energy dispersion in which enhanced interactions promote correlated electron states. The twisted double bilayer graphene (TDBG), where two Bernal bilayer graphene are stacked with a twist angle, is such a moiré system with tunable flat bands. Here, we use gate-tuned scanning tunneling spectroscopy to directly demonstrate the tunability of the band structure of TDBG with an electric field and to show spectroscopic signatures of electronic correlations and topology for its flat band. Our spectroscopic experiments are in agreement with a continuum model of TDBG band structure and reveal signatures of a correlated insulator gap at partial filling of its isolated flat band. The topological properties of this flat band are probed with the application of a magnetic field, which leads to valley polarization and the splitting of Chern bands with a large effective g-factor.

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