scholarly journals Quantum spin–quantum anomalous Hall effect with tunable edge states in Sb monolayer-based heterostructures

2016 ◽  
Vol 94 (23) ◽  
Author(s):  
Tong Zhou ◽  
Jiayong Zhang ◽  
Yang Xue ◽  
Bao Zhao ◽  
Huisheng Zhang ◽  
...  
Keyword(s):  
Hall Effect ◽  
Anomalous Hall Effect ◽  
Quantum Spin ◽  
Edge States ◽  
Quantum Anomalous Hall Effect ◽  
Spin Quantum

Ferromagnetic dual topological insulator in a two-dimensional honeycomb lattice

2020 ◽  
Vol 7 (9) ◽  
pp. 2431-2438
Author(s):  
Hao Wang ◽  
Ning Mao ◽  
Chengwang Niu ◽  
Shiying Shen ◽  
Myung-Hwan Whangbo ◽  
...  
Keyword(s):  
Hall Effect ◽  
Topological Insulator ◽  
Topological Insulators ◽  
Anomalous Hall Effect ◽  
Topological Invariant ◽  
Honeycomb Lattice ◽  
Two Dimensional ◽  
Edge States ◽  
Quantum Anomalous Hall Effect ◽  
Significant Attention

Magnetic topological insulators (TIs), including the quantum anomalous Hall effect and antiferromagnetic TIs, have attracted significant attention owing to the exotic properties they give rise to, however, ferromagnetic TIs with gapless surface/edge states and a nonzero topological invariant have not been reported so far.

scholarly journals Topological Phase and Quantum Anomalous Hall Effect in Ferromagnetic Transition-Metal Dichalcogenides Monolayer 1T-VSe2

Nanomaterials ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 1998
Author(s):  
Angus Huang ◽  
Chin-Hsuan Chen ◽  
Ching-Hao Chang ◽  
Horng-Tay Jeng
Keyword(s):  
Transition Metal ◽  
Hall Effect ◽  
Transition Metal Dichalcogenides ◽  
Anomalous Hall Effect ◽  
Ferromagnetic Transition ◽  
Spin Orbit Coupling ◽  
Edge States ◽  
Quantum Anomalous Hall Effect ◽  
Metal Dichalcogenides ◽  
Crossing Point

Magnetic two-dimensional (2D) van der Waals materials have attracted tremendous attention because of their high potential in spintronics. In particular, the quantum anomalous Hall (QAH) effect in magnetic 2D layers shows a very promising prospect for hosting Majorana zero modes at the topologically protected edge states in proximity to superconductors. However, the QAH effect has not yet been experimentally realized in monolayer systems to date. In this work, we study the electronic structures and topological properties of the 2D ferromagnetic transition-metal dichalcogenides (TMD) monolayer 1T−VSe2 by first-principles calculations with the Heyd–Scuseria–Ernzerhof (HSE) functional. We find that the spin-orbit coupling (SOC) opens a continuous band gap at the magnetic Weyl-like crossing point hosting the quantum anomalous Hall effect with Chern number C=2. Moreover, we demonstrate the topologically protected edge states and intrinsic (spin) Hall conductivity in this magnetic 2D TMD system. Our results indicate that 1T−VSe2 monolayer serves as a stoichiometric quantum anomalous Hall material.

scholarly journals Fully spin-polarized quadratic non-Dirac bands realized quantum anomalous Hall effect

2020 ◽  
Vol 22 (2) ◽  
pp. 549-555 ◽  
Author(s):  
Ping Li ◽  
Tian-Yi Cai
Keyword(s):  
Magnetic Field ◽  
Hall Effect ◽  
Quantum State ◽  
Anomalous Hall Effect ◽  
Edge States ◽  
Quantum Anomalous Hall Effect ◽  
Spin Polarized

The quantum anomalous Hall effect is an intriguing quantum state that exhibits chiral edge states in the absence of a magnetic field.

scholarly journals Quantum anomalous Hall effect in a stable 1T-YN2monolayer with a large nontrivial bandgap and a high Chern number

Nanoscale ◽  
2018 ◽  
Vol 10 (17) ◽  
pp. 8153-8161 ◽  
Author(s):  
Xiangru Kong ◽  
Linyang Li ◽  
Ortwin Leenaerts ◽  
Weiyang Wang ◽  
Xiong-Jun Liu ◽  
...  
Keyword(s):  
Hall Effect ◽  
Anomalous Hall Effect ◽  
Chern Number ◽  
Edge States ◽  
Quantum Anomalous Hall Effect

Three chiral edge states related to a high Chern number.

Multiple Weyl fermions and tunable quantum anomalous Hall effect in 2D half-metal with huge spin-related energy gap

2021 ◽  
Vol 551 ◽  
pp. 149390
Author(s):  
Weizhen Meng ◽  
Xiaoming Zhang ◽  
Weiwang Yu ◽  
Ying Liu ◽  
Lu Tian ◽  
...  
Keyword(s):  
Hall Effect ◽  
Energy Gap ◽  
Anomalous Hall Effect ◽  
Half Metal ◽  
Related Energy ◽  
Quantum Anomalous Hall Effect ◽  
Weyl Fermions

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...

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