Work

Conductive domain walls in ferroelectrics as tunable coherent and chiral THz radiation source

Year: 2026

Type: article

Abstract: THz emission associated with currents in conductive domain walls in BiFeO3 following infrared radiation is theoretically investigated. This experimentally observed phenomenon is explained by the domain wall stripes acting as metallic resonators, with the oscillating charge accumulation being at the domain wall edges. The charge oscillation frequency is related to the plasma frequency inside the domain wall. The value of plasma frequency determines both the frequency and the amplitude of the emission emanating from the BiFeO3 sample. We show that for certain geometries of the domain wall structure and for specific polarization of the incident pulse, the THz emission embodies a non-vanishing chirality.

Source: AIP Advances

DOI: 10.1063/5.0301600

Authors: Ramaz Khomeriki, Kathrin Dörr, Jamal Berakdar

Institutions: Tbilisi State University, Martin Luther University Halle-Wittenberg

Language: English

Topic: Multiferroics and related materials

Subfield: Electronic, Optical and Magnetic Materials

Field: Materials Science

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $1,350