Dielectric transparency induced by hetero-phase oscillations near the phase transition of relaxor ferroelectrics

TL;DR

This paper reports the discovery of dielectric transparency in relaxor ferroelectric KLT near its phase transition, revealing hetero-phase fluctuations and offering insights into the transition mechanism, analogous to EIT in atomic systems.

Contribution

It demonstrates dielectric transparency induced by hetero-phase oscillations in relaxor ferroelectrics, linking macroscopic fluctuations to phase transition dynamics.

Findings

Observation of a transparency window in dielectric spectrum

Identification of hetero-phase fluctuations near transition

Modeling of phenomena using classical driven oscillator system

Abstract

We report the observation of a "transparency window" in the dielectric resonant absorption spectrum of the relaxor ferroelectric K1-xLixTaO3 (KLT) in the vicinity of its weakly first order transition. This phenomenon is shown to be conceptually similar to the electro-magnetically induced transparency (EIT) phenomenon observed in atomic vapors, which can be modeled classically by a driven master -slave oscillator system. In KLT, it reveals the presence of macroscopic hetero-phase fluctuations and provides unique information on the nature and mechanism of the phase transition in relaxors.