scholarly journals Dirac node engineering and flat bands in doped Dirac materials

2021 ◽  
Vol 3 (3) ◽  
Author(s):  
Anna Pertsova ◽  
Peter Johnson ◽  
Daniel P. Arovas ◽  
Alexander V. Balatsky
Keyword(s):  
Flat Bands ◽  
Dirac Materials

scholarly journals Robustness and universality of surface states in Dirac materials

2018 ◽  
Vol 115 (23) ◽  
pp. 5908-5913 ◽  
Author(s):  
Oles Shtanko ◽  
Leonid Levitov
Keyword(s):  
Bound States ◽  
Dirac Point ◽  
Surface States ◽  
Surface Modes ◽  
Flat Bands ◽  
Mode Dispersion ◽  
Dirac Materials ◽  
Surface Disorder ◽  
Band Crossing ◽  
Bulk Band

Ballistically propagating topologically protected states harbor exotic transport phenomena of wide interest. Here we describe a nontopological mechanism that produces such states at the surfaces of generic Dirac materials, giving rise to propagating surface modes with energies near the bulk band crossing. The robustness of surface states originates from the unique properties of Dirac–Bloch wavefunctions which exhibit strong coupling to generic boundaries. Surface states, described by Jackiw–Rebbi-type bound states, feature a number of interesting properties. Mode dispersion is gate tunable, exhibiting a wide variety of different regimes, including nondispersing flat bands and linear crossings within the bulk bandgap. The ballistic wavelike character of these states resembles the properties of topologically protected states; however, it requires neither topological restrictions nor additional crystal symmetries. The Dirac surface states are weakly sensitive to surface disorder and can dominate edge transport at the energies near the Dirac point.

Emerging flat bands in large-angle twisted bi-layer graphene under pressures

Nanoscale ◽  
2021 ◽  
Author(s):  
Liangbing Ge ◽  
Ni Kun ◽  
Xiaojun Wu ◽  
Zhengping Fu ◽  
Yalin Lu ◽  
...  
Keyword(s):  
Large Angle ◽  
Magic Angle ◽  
Unconventional Superconductivity ◽  
Flat Bands ◽  
Layer Graphene

Recent experiments on magic-angle twisted bi-layer graphene have attracted an intensive attention due to exotic properties such as unconventional superconductivity and correlated insulation. These phenomena were often found at a...

scholarly journals Half-Dirac Semimetal and Quantum Anomalous Hall Effect in Kagome Cd2N3 Lattice

2020 ◽  
Author(s):  
Xinyang Li ◽  
Weixiao Ji ◽  
Peiji Wang ◽  
Chang-wen Zhang
Keyword(s):  
Hall Effect ◽  
Quantum State ◽  
Anomalous Hall Effect ◽  
Topological Phases ◽  
Dirac Semimetal ◽  
Quantum Anomalous Hall Effect ◽  
Dirac Materials ◽  
Low Dimensionality ◽  
Dirac Semimetals ◽  
Topological Phases Of Matter

Half-Dirac semimetals (HDSs), which possess 100% spin-polarizations for Dirac materials, are highly desirable for exploring various topological phases of matter, as low-dimensionality opens unprecedented opportunities for manipulating the quantum state...

scholarly journals Quantum transport in flat bands and supermetallicity

2021 ◽  
Vol 103 (7) ◽  
Author(s):  
G. Bouzerar ◽  
D. Mayou
Keyword(s):  
Quantum Transport ◽  
Flat Bands

scholarly journals Interaction-driven transition between the Wigner crystal and the fractional Chern insulator in topological flat bands

2021 ◽  
Vol 104 (8) ◽  
Author(s):  
Michał Kupczyński ◽  
Błażej Jaworowski ◽  
Arkadiusz Wójs
Keyword(s):  
Wigner Crystal ◽  
Flat Bands

scholarly journals Tuning the flat bands of the kagome metal CoSn with Fe, In, or Ni doping

2021 ◽  
Vol 5 (4) ◽  
Author(s):  
B. C. Sales ◽  
W. R. Meier ◽  
A. F. May ◽  
J. Xing ◽  
J.-Q. Yan ◽  
...  
Keyword(s):  
Ni Doping ◽  
Flat Bands

scholarly journals Domain wall induced spin-polarized flat bands in antiferromagnetic topological insulators

2021 ◽  
Vol 103 (23) ◽  
Author(s):  
E. K. Petrov ◽  
V. N. Men'shov ◽  
I. P. Rusinov ◽  
M. Hoffmann ◽  
A. Ernst ◽  
...  
Keyword(s):  
Domain Wall ◽  
Topological Insulators ◽  
Flat Bands ◽  
Spin Polarized

scholarly journals Topological flat bands and correlated states in twisted monolayer-bilayer graphene

2020 ◽  
Vol 2 (3) ◽  
Author(s):  
Louk Rademaker ◽  
Ivan V. Protopopov ◽  
Dmitry A. Abanin
Keyword(s):  
Bilayer Graphene ◽  
Flat Bands
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