scholarly journals Observation of Possible Nonlinear Anomalous Hall Effect in Organic Two-Dimensional Dirac Fermion System

2021 ◽  
Author(s):  
Andhika Kiswandhi ◽  
Toshihito Osada
Keyword(s):  
Hall Effect ◽  
Charge Order ◽  
Anomalous Hall Effect ◽  
Zero Magnetic Field ◽  
Dirac Fermion ◽  
Two Dimensional ◽  
Electronic Phase ◽  
Direction Dependence ◽  
Insulating Phase ◽  
Massless Dirac Fermion

Abstract We report the observation of nonlinear anomalous Hall effect (NLAHE) in the multilayered organic conductor α-(BEDT-TTF)2I3 in the charge order (CO) insulating phase just under the critical pressure for transition into two-dimensional (2D) massless Dirac fermion (DF) phase. We successfully extracted the finite nonlinear Hall voltage proportional to square current at zero magnetic field. The observed NLAHE features, current direction dependence and correlation with CO, are consistent with the previous estimation assuming 2D massive DF with a pair of tilted Dirac cones. This is the first observation of topological transport in organic conductors, and also the first example of NLAHE in the electronic phase with spontaneous symmetry breaking.

Prediction of intrinsic two dimensional ferromagnetism realized quantum anomalous Hall effect

2019 ◽  
Vol 21 (12) ◽  
pp. 6712-6717 ◽  
Author(s):  
Ping Li
Keyword(s):  
Hall Effect ◽  
Anomalous Hall Effect ◽  
Honeycomb Lattice ◽  
Two Dimensional ◽  
Quantum Anomalous Hall Effect ◽  
Insulating Phase

The monolayer of FeX3 (X = Cl, Br, I) possesses a quantum anomalous Hall insulating phase generated by the honeycomb lattice of iron atoms.

scholarly journals Light-induced anomalous Hall effect in massless Dirac fermion systems and topological insulators with dissipation

2019 ◽  
Vol 21 (9) ◽  
pp. 093005 ◽  
Author(s):  
S A Sato ◽  
P Tang ◽  
M A Sentef ◽  
U De Giovannini ◽  
H Hübener ◽  
...  
Keyword(s):  
Hall Effect ◽  
Topological Insulators ◽  
Anomalous Hall Effect ◽  
Dirac Fermion ◽  
Fermion Systems ◽  
Massless Dirac Fermion

High-temperature Dirac half-metal PdCl3: a promising candidate for realizing quantum anomalous Hall effect

2018 ◽  
Vol 6 (38) ◽  
pp. 10284-10291 ◽  
Author(s):  
Ya-ping Wang ◽  
Sheng-shi Li ◽  
Chang-wen Zhang ◽  
Shu-feng Zhang ◽  
Wei-xiao Ji ◽  
...  
Keyword(s):  
High Temperature ◽  
Hall Effect ◽  
Single Layer ◽  
Anomalous Hall Effect ◽  
Two Dimensional ◽  
Promising Candidate ◽  
Ideal Candidate ◽  
Half Metal ◽  
Quantum Anomalous Hall Effect

Single-layer PdCl3, a new two-dimensional honeycomb metal–halogen lattice, is proposed as an ideal candidate for realizing both a Dirac half-metal and the quantum anomalous Hall effect.

scholarly journals Progress Review on Topological Properties of Heusler Materials

2020 ◽  
Vol 213 ◽  
pp. 02016
Author(s):  
Zhi Lin
Keyword(s):  
Hall Effect ◽  
Surface States ◽  
Anomalous Hall Effect ◽  
Edge State ◽  
Chiral Anomaly ◽  
Dirac Fermion ◽  
High Symmetry ◽  
Heusler Compounds ◽  
Topological Properties ◽  
Topological State

Starting from crystal, electronic and magnetic structures of Heusler compounds, this paper studies the new topological materials related to Heusler compounds and their topological properties, such as anomalous Hall effect, skyrmions, chiral anomaly, Dirac fermion, Weyl fermion, transverse Nernst thermoelectric effect, thermal spintronics and topological surface states. It can be discovered that the topological state of Heusler compound can be well protected due to its high symmetry, thus producing rich topological properties. Heusler materials belonged to Weyl semimetals usually have strong anomalous Hall effect, and the Heusler materials with doping or Anomalous Nernst Effect (ANE) usually have higher thermoelectric figure of merit. These anomalous effects are closely related to the strong spin–orbit interaction. In application, people can use the non-dissipative edge state of quantum anomalous Hall effect to develop a new generation of low-energy transistors and electronic devices. The conversion efficiency of thermoelectric materials can be improved by ANE, and topological superconductivity can be used to promote the progress of quantum computation.

scholarly journals Observation of anomalous Hall effect in a non-magnetic two-dimensional electron system

2017 ◽  
Vol 8 (1) ◽  
Author(s):  
D. Maryenko ◽  
A. S. Mishchenko ◽  
M. S. Bahramy ◽  
A. Ernst ◽  
J. Falson ◽  
...  
Keyword(s):  
Hall Effect ◽  
Anomalous Hall Effect ◽  
Electron System ◽  
Two Dimensional ◽  
Dimensional Electron ◽  
Dimensional Electron System
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