Page 2: Research news on Electronically polarized systems

Electronically polarized systems are physical systems in which the electronic charge distribution is displaced relative to the nuclei, producing a net electric polarization that can be static, induced, or dynamic. This polarization arises from external electric fields, internal crystal fields, broken inversion symmetry, interfaces, or collective electronic instabilities, and is described microscopically by changes in electronic wavefunctions and macroscopically by a polarization vector field. Such systems include dielectrics, ferroelectrics, polar semiconductors, and heterostructures where bound or itinerant electrons respond anisotropically, strongly influencing dielectric response, excitations, screening, charge transport, and nonlinear optical properties central to condensed-matter and materials physics.

3D 'polar chiral bobbers' identified in ferroelectric thin films

A novel type of three-dimensional (3D) polar topological structure, termed the "polar chiral bobber," has been discovered in ferroelectric oxide thin films, demonstrating promising potential for high-density multistate non-volatile ...

Toothbrush-activated powder whitens, repairs and protects teeth

Even with regular brushing, teeth can become stained from genetic factors or consuming foods and drinks like tomatoes and coffee. Chemical whiteners can help, but they can also damage teeth in the process. So, researchers ...

Ferroelectric materials boost data storage potential

Researchers at Oak Ridge National Laboratory have used specialized tools to study materials at the atomic scale and analyze defects at the surface of ferroelectric materials. Results of their research help to better understand ...

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