The duality between electric and magnetic dipoles inspires recent comparisons between ferronics and magnonics.Here we predict surface polarization waves or“ferrons”in ferroelectric insulators,taking the long-range d...The duality between electric and magnetic dipoles inspires recent comparisons between ferronics and magnonics.Here we predict surface polarization waves or“ferrons”in ferroelectric insulators,taking the long-range dipolar interaction into account.We predict properties that are strikingly different from the magnetic counterpart,i.e.the surface Damon-Eshbach magnons in ferromagnets.The dipolar interaction pushes the ferron branch with locked circular polarization and momentum to the ionic plasma frequency.The low-frequency modes are on the other hand in-plane polarized normal to their wave vectors.The strong anisotropy of the lower branch renders directional emissions of electric polarization and chiral near fields when activated by a focused laser beam,allowing optical routing in ferroelectric devices.展开更多
基金financially supported by the National Natural Science Foundation of China(Grant No.0214012051)the startup grant of Huazhong University of Science and Technology(Grants Nos.3004012185,3004012198)+5 种基金the financial support by JSPS KAKENHI(Grant Nos.19H00645,22H04965)financially supported in Brazil by Conselho Nacional de Desenvolvimento Científico e Tecnológico(CNPq)Coordenac ao de Aperfeicoamento de Pessoal de Nível Superior(CAPES)Financiadora de Estudos e Projetos(FINEP)Fundac ao de AmparoáCiencia e Tecnologia do Estado de Pernambuco(FACEPE)in Chile by Fondo Nacional de Desarrollo Científico y Tecnológico(FONDECYT)(Grant No.1210641)。
文摘The duality between electric and magnetic dipoles inspires recent comparisons between ferronics and magnonics.Here we predict surface polarization waves or“ferrons”in ferroelectric insulators,taking the long-range dipolar interaction into account.We predict properties that are strikingly different from the magnetic counterpart,i.e.the surface Damon-Eshbach magnons in ferromagnets.The dipolar interaction pushes the ferron branch with locked circular polarization and momentum to the ionic plasma frequency.The low-frequency modes are on the other hand in-plane polarized normal to their wave vectors.The strong anisotropy of the lower branch renders directional emissions of electric polarization and chiral near fields when activated by a focused laser beam,allowing optical routing in ferroelectric devices.
