The Dirac half-semimetal and quantum anomalous Hall effect in two-dimensional Janus Mn<sub>2</sub>X<sub>3</sub>Y<sub>3</sub> (X, Y = F, Cl, Br, I)
Ping Li, Zhi‐Xin Guo
Abstract
exhibit a nontrivial band gap, indicating that they host a QAH phase. More interestingly, both the Chern number sign and the chiral edge current are tuned by changing the direction of magnetization. Moreover, we find that topological properties are related to the lattice constant and magnetocrystalline anisotropy. Our findings would suggest the possibility of not only realizing the QAH effect but also designing the flow direction of the edge current.
Topics & Concepts
SemimetalCondensed matter physicsDirac (video compression format)JanusQuantum Hall effectPhysicsDensity functional theoryCurie temperatureHall effectMaterials scienceFerromagnetismQuantum mechanicsElectronBand gapNanotechnologyElectrical resistivity and conductivityNeutrinoTopological Materials and PhenomenaGraphene research and applicationsQuantum and electron transport phenomena