Electric polarization and nonlinear optical effects in noncentrosymmetric magnets
Takahiro Morimoto, Sota Kitamura, Shun Okumura
Abstract
Magnetic excitations in multiferroic materials accompany electric polarization, known as electromagnons. The authors develop here a general framework to study electric polarization and nonlinear optical responses of noncentrosymmetric magnets based on spin models. They theoretically demonstrate the optical excitation of electromagnon-induced dc current generation (i.e., a photovoltaic effect) from the so-called shift current mechanism.
Topics & Concepts
Point reflectionPhysicsNonlinear systemMagnonPolarization (electrochemistry)Diagrammatic reasoningInversion (geology)Formalism (music)Quantum electrodynamicsInduced polarizationQuantum mechanicsCondensed matter physicsFerromagnetismChemistryComputer scienceElectrical resistivity and conductivityMusicalStructural basinPaleontologyPhysical chemistryProgramming languageArtBiologyVisual artsMagneto-Optical Properties and ApplicationsPhysics of Superconductivity and MagnetismMagnetic properties of thin films