| Title: |
Transferring orbital angular momentum to an electron beam reveals toroidal and chiral order |
| Authors: |
Nguyen, KX; Jiang, Y; Cao, MC; Purohit, P; Yadav, AK; García-Fernández, P; Tate, MW; Chang, CS; Aguado-Puente, P; Íñiguez, J; Gomez-Ortiz, F; Gruner, SM; Junquera, J; Martin, LW; Ramesh, R; Muller, DA |
| Source: |
Physical Review B, vol 107, iss 20 |
| Publisher Information: |
eScholarship, University of California |
| Publication Year: |
2023 |
| Collection: |
University of California: eScholarship |
| Subject Terms: |
Physical Sciences; Chemical Sciences; Engineering; Fluids & Plasmas |
| Description: |
Orbital angular momentum (OAM) and torque transfer play central roles in a wide range of magnetic textures and devices including skyrmions and spin-torque electronics. Analogous topological structures are now also being explored in ferroelectrics, including polarization vortex arrays in ferroelectric/dielectric superlattices. Unlike magnetic toroidal order, electric toroidal order does not couple directly to linear external fields. Instead, we find that the presence of an electric toroidal moment in a ferrorotational phase transfers measurable torque and OAM to a localized electron beam in the ballistic limit. We record these torque transfers from a high-energy electron beam using a momentum-resolved detector. This approach provides a high-sensitivity method to detect polarization fields and their more complex order parameters and topologies. In addition to toroidal order, we also demonstrate high-precision measurements of vorticity and chirality for polar vortexlike phases. |
| Document Type: |
article in journal/newspaper |
| File Description: |
application/pdf |
| Language: |
unknown |
| Relation: |
qt7sv8c4nr; https://escholarship.org/uc/item/7sv8c4nr; https://escholarship.org/content/qt7sv8c4nr/qt7sv8c4nr.pdf |
| DOI: |
10.1103/physrevb.107.205419 |
| Availability: |
https://escholarship.org/uc/item/7sv8c4nr; https://escholarship.org/content/qt7sv8c4nr/qt7sv8c4nr.pdf; https://doi.org/10.1103/physrevb.107.205419 |
| Rights: |
CC-BY-NC-SA |
| Accession Number: |
edsbas.73D0A832 |
| Database: |
BASE |