Multiple Topological Phases with Electronic Correlation in Intrinsic Ferromagnetic Semimetal VI Monolayer.

2D topological materials with magnetic ordering have become hot topics due to their nontrivial band topology and quantum states. In this work, the second-order topological states and evolution of linear band crossing are successfully predicted utilizing the effective k· p and tight binding models in the intrinsic ferromagnetic VI monolayer under various effective Hubble interaction U. Upon inclusion of spin orbit coupling, a small bandgap (E-1) of 12.

Two-dimensional ferromagnetic semiconductors of rare-earth Janus 2H-GdIBr monolayers with large valley polarization.

Based on a rare-earth Gd atom with 4f electrons, through first-principles calculations, we demonstrate that a Janus 2H-GdIBr monolayer exhibits an intrinsic ferromagnetic (FM) semiconductor character with an indirect band gap of 0.75 eV, a high Curie temperature of 260 K, a significant magnetic moment of 8 per f.u.

Enhanced room-temperature ferromagnetism on (InCoSn)O films: magnetic mechanism, optical and transport properties.

The effects of Co doping on the structural, optical, magnetic and transport properties of (InCoSn)O films grown by RF-magnetron sputtering were systematically investigated by theoretical and experimental techniques. The detailed structural analyses revealed that all the (InCoSn)O films possess the cubic bixbyite structure, with the substitutional Co at the In sites of the InO matrix, while some of the Co atoms form Co metal clusters. Obvious room-temperature (RT) ferromagnetic behavior was observed and the saturated magnetization (M) first increased, then decreased with increased Co concentration, while carrier concentration n decreased monotonically, implying that the Co metal clusters are superparamagnetic and the observed RT ferromagnetism is not mediated by the charge carriers.

Investigation of local structural environments and room-temperature ferromagnetism in (Fe,Cu)-codoped In2O3 diluted magnetic oxide films.

The local structural, optical, magnetic and transport properties of (In0.95-xFexCu0.05)2O3 (0.