Visible-Light-Control of Dielectric Permittivity in Ferroelectrics with Charged Domain Walls

Author(s)

Ordonez-Pimentel, Jonathan ; Garcia, Jose E. ; da Silva Jr, Paulo S. ; Venet, Michel

• Document type: Journal article
• Source: PHYSICAL REVIEW APPLIED; v. 19, n. 3, p. 8-pg., 2023-03-29.

Abstract

Optical control of functional properties in ferroic materials is now a highly appealing topic because it may entail different paradigms for future technologies. In ferroelectrics, in particular, controlling the properties with light implies noncontact external control of the material's functionality, thereby opening a pathway for developing the next generation of photocontrolled devices. Recently, experimental obser-vations have demonstrated that the dielectric permittivity of charged-domain-wall ferroelectrics can be easily modulated by visible light. However, because of the wide band gap of ferroelectric materials, the physical origin of this phenomenon is still controversial. Here, the photoinduced electronic reconstruction mechanism is proposed as the primary light-absorption mechanism in charged domain walls, allowing an understanding of the origin of the visible-light control of dielectric permittivity in ferroelectric materials. (AU)

• FAPESP's process: 17/17872-1 - New lead free magnetoelectric composites with high performance
• Grantee: Michel Venet Zambrano
• Support Opportunities: Scholarships abroad - Research
• FAPESP's process: 22/08030-5 - Optical control of the polarization in ferroelectric materials
• Grantee: Michel Venet Zambrano
• Support Opportunities: Regular Research Grants