May 26, 2015 · Computational physicists have developed a novel method that accurately reveals how electrical vortices affect electronic properties of materials that are used in a wide range of applications,...

May 26, 2015 · An electrical vortex occurs when the electric dipoles arrange themselves in an unusual swirling movement, Bellaiche said. In this ferroelectric system, electrical vortices are created and determined by the temperature of the material, Bellaiche said.

3 hours ago · The optical rotatum was created in the lab of Federico Capasso, the Robert L. Wallace Professor of Applied Physics and the Vinton Hayes Senior Research Fellow in Electrical Engineering at SEAS. “This is a new behavior of light consisting of an optical vortex that propagates through space and changes in unusual ways,” Capasso said.

2 days ago · The field dependence of the first order vortex lattice form factor, FF, at (a) 100 mK and (b) 1.5 K. Credit: Physical Review Letters (2025). DOI: 10.1103/PhysRevLett.134.116001

Nov 1, 2020 · Motivated to fill this gap in knowledge, we simulate numerically and describe analytically the formation of polarization vortices in spherical nanoparticles consisting of a ferroelectric core covered with a paraelectric shell, and …

Feb 21, 2020 · We find that closed but not exact electric fields can produce electron vortex beams. We proceed by fabricating a versatile, robust, and near-obstruction-free device that is designed to approximately produce such fields and we systematically study their influence on incoming electron beams.

Apr 2, 2025 · Nevertheless, the experimentally measured vortex purity reached 80%, while the undesired oppositely charged vortex contribution was only 2% for a vortex with charge 10. ... Department of ...

May 1, 1995 · An electric vortex is the circulation of electron space charge about a magnetic field line that is transported by ion momentum. In cold, or low {beta} flow the vortex diameter is the minimum length scale of charge neutrality.

In this article, we discuss how an electric field can be shaped to impart a phase vortex on an electron beam. The requirement to achieve such an effect relies deeply on the nature of the topology of electric fields.

The following sections are included: Preliminary The electric momentum field The nature of the electric field Spin–3 circuital OAM ring action Coulomb’s law Preamble Single-vortex source axial macr...