An effective theory for GdGaI under antiferromagnetic umbrella order hosts C=0 and C=±4 Chern insulators separated by double-Weyl semimetals, with magnetic field driving insulator-metal transitions and stabilizing C=±2 phases.
Emergent topological magnetism in Hund’s excitonic insulator
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Field-induced metal-insulator transition, Chern insulators, and topological semimetals in a clean magnetic semiconductor GdGaI
An effective theory for GdGaI under antiferromagnetic umbrella order hosts C=0 and C=±4 Chern insulators separated by double-Weyl semimetals, with magnetic field driving insulator-metal transitions and stabilizing C=±2 phases.