تقرير
Transferring Orbital Angular Momentum to an Electron Beam Reveals Toroidal and Chiral Order
| العنوان: | Transferring Orbital Angular Momentum to an Electron Beam Reveals Toroidal and Chiral Order |
|---|---|
| المؤلفون: | Nguyen, Kayla X., Jiang, Yi, Cao, Michael C., Purohit, Prafull, Yadav, Ajay K., García-Fernández, Pablo, Tate, Mark W., Chang, Celesta S., Aguado-Puente, Pablo, Íñiguez, Jorge, Gomez-Ortiz, Fernando, Gruner, Sol M., Junquera, Javier, Martin, Lane W., Ramesh, Ramamoorthy, Muller, D. A. |
| سنة النشر: | 2020 |
| المجموعة: | Condensed Matter Physics (Other) |
| مصطلحات موضوعية: | Condensed Matter - Materials Science, Physics - Applied Physics |
| الوصف: | Orbital angular momentum and torque transfer play central roles in a wide range of magnetic textures and devices including skyrmions and spin-torque electronics(1-4). Analogous topological structures are now also being explored in ferroelectrics, including polarization vortex arrays in ferroelectric/dielectric superlattices(5). Unlike magnetic toroidal order, electric toroidal order does not couple directly to linear external fields. To develop a mechanism that can control switching in polarization vortices, we utilize a high-energy electron beam and show that transverse currents are generated by polar order in the ballistic limit. We find that the presence of an electric toroidal moment in a ferro-rotational phase transfers a measurable torque and orbital angular momentum to the electron beam. Furthermore, we find that the complex polarization patterns, observed in these heterostructures, are microscopically chiral with a non-trivial axial component of the polarization. This chirality opens the door for the coupling of ferroelectric and optical properties. |
| نوع الوثيقة: | Working Paper |
| URL الوصول: | http://arxiv.org/abs/2012.04134 |
| رقم الأكسشن: | edsarx.2012.04134 |
| قاعدة البيانات: | arXiv |
| الوصف غير متاح. |