Theory of the electric field controlled antiferromagnetic spin Hall oscillator and detector
Giancarlo Consolo, Giovanna Valenti, A. R. Safin, С. А. Никитов, V. Tyberkevich, A. N. Slavin
Abstract
A theory of an electrically controlled terahertz-frequency auto-oscillator is developed here within the framework of the antiferromagnetic sigma model. The structure is based on a trilayer heterostructure: a piezoelectric ceramic, NiO-based antiferromagnet (AFM), and a heavy metal. The authors demonstrate that the frequency of the AFM resonance of the layered structure in a passive subcritical regime can be controlled by the external electric field applied to the piezoelectric, by choosing a proper piezoelectric material, and by the magnitude of the electric current flowing in the heavy metal.
Topics & Concepts
AntiferromagnetismCondensed matter physicsElectric fieldPiezoelectricityTerahertz radiationSpin (aerodynamics)PhysicsMaterials scienceSpin Hall effectOptoelectronicsSpin polarizationQuantum mechanicsAcousticsThermodynamicsElectronMagnetic properties of thin filmsPhysics of Superconductivity and MagnetismQuantum and electron transport phenomena