scholarly journals Photoinduced anomalous Hall effect in the interacting Haldane model: Targeting topological states with pump pulses

2021 ◽  
Vol 104 (12) ◽  
Author(s):  
Can Shao ◽  
P. D. Sacramento ◽  
Rubem Mondaini
Keyword(s):  
Hall Effect ◽  
Anomalous Hall Effect ◽  
Haldane Model ◽  
Topological States

scholarly journals Quantum Anomalous Hall Effect and Tunable Topological States in 3d Transition Metals Doped Silicene

2013 ◽  
Vol 3 (1) ◽  
Author(s):  
Xiao-Long Zhang ◽  
Lan-Feng Liu ◽  
Wu-Ming Liu
Keyword(s):  
Transition Metals ◽  
Hall Effect ◽  
Coupling Effect ◽  
Anomalous Hall Effect ◽  
Quantum Anomalous Hall Effect ◽  
Band Inversion ◽  
Topological States ◽  
Stable Quantum ◽  
Metal Doped ◽  
Silicon Based

Abstract Silicene is an intriguing 2D topological material which is closely analogous to graphene but with stronger spin orbit coupling effect and natural compatibility with current silicon-based electronics industry. Here we demonstrate that silicene decorated with certain 3d transition metals (Vanadium) can sustain a stable quantum anomalous Hall effect using both analytical model and first-principles Wannier interpolation. We also predict the quantum valley Hall effect and electrically tunable topological states could be realized in certain transition metal doped silicene where the energy band inversion occurs. Our findings provide new scheme for the realization of quantum anomalous Hall effect and platform for electrically controllable topological states which are highly desirable for future nanoelectronics and spintronics application.

Stanene on a SiC(0001) surface: a candidate for realizing quantum anomalous Hall effect

2019 ◽  
Vol 21 (21) ◽  
pp. 11150-11157 ◽  
Author(s):  
Ping Li
Keyword(s):  
Hall Effect ◽  
Anomalous Hall Effect ◽  
Quantum Anomalous Hall Effect ◽  
Topological States

Stanene, a cousin of graphene, has pz-orbital Dirac states, but the quadratic topological states are derived from the px,y orbitals rather than pz orbital in stanene on SiC(0001).

scholarly journals Interface-induced sign reversal of the anomalous Hall effect in magnetic topological insulator heterostructures

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Fei Wang ◽  
Xuepeng Wang ◽  
Yi-Fan Zhao ◽  
Di Xiao ◽  
Ling-Jie Zhou ◽  
...  
Keyword(s):  
Hall Effect ◽  
Electric Fields ◽  
First Principles ◽  
Berry Phase ◽  
Condensed Matter ◽  
Anomalous Hall Effect ◽  
First Principles Calculations ◽  
Sign Reversal ◽  
Berry Curvature ◽  
Topological Materials

AbstractThe Berry phase picture provides important insights into the electronic properties of condensed matter systems. The intrinsic anomalous Hall (AH) effect can be understood as the consequence of non-zero Berry curvature in momentum space. Here, we fabricate TI/magnetic TI heterostructures and find that the sign of the AH effect in the magnetic TI layer can be changed from being positive to negative with increasing the thickness of the top TI layer. Our first-principles calculations show that the built-in electric fields at the TI/magnetic TI interface influence the band structure of the magnetic TI layer, and thus lead to a reconstruction of the Berry curvature in the heterostructure samples. Based on the interface-induced AH effect with a negative sign in TI/V-doped TI bilayer structures, we create an artificial “topological Hall effect”-like feature in the Hall trace of the V-doped TI/TI/Cr-doped TI sandwich heterostructures. Our study provides a new route to create the Berry curvature change in magnetic topological materials that may lead to potential technological applications.

scholarly journals 2D‐Berry‐Curvature‐Driven Large Anomalous Hall Effect in Layered Topological Nodal‐Line MnAlGe

2021 ◽  
pp. 2006301
Author(s):  
Satya N. Guin ◽  
Qiunan Xu ◽  
Nitesh Kumar ◽  
Hsiang‐Hsi Kung ◽  
Sydney Dufresne ◽  
...  
Keyword(s):  
Hall Effect ◽  
Anomalous Hall Effect ◽  
Nodal Line ◽  
Berry Curvature ◽  
Curvature Driven

scholarly journals Anomalous Hall effect in a magnetically extended topological insulator heterostructure

2020 ◽  
Vol 4 (9) ◽  
Author(s):  
Nan Liu ◽  
Xuefan Niu ◽  
Yuxin Liu ◽  
Qinghua Zhang ◽  
Lin Gu ◽  
...  
Keyword(s):  
Hall Effect ◽  
Topological Insulator ◽  
Anomalous Hall Effect

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
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