Pseudo-Spin Based Dynamical Model for Polarisation Switching in Ferroelectrics

TL;DR

This paper investigates the dynamic response of electric dipoles in ferroelectric chains using two spin dynamics methods, providing insights into polarization switching mechanisms with a focus on a pseudo-spin model.

Contribution

It introduces a pseudo-spin based dynamical model for ferroelectrics and compares two spin dynamics approaches, including a variable pseudo-spin size, to analyze polarization switching.

Findings

Comparison of two spin dynamics methods for ferroelectric response

Validation of the pseudo-spin model against Landau-Devonshire theory

Insights into energy storage and polarization dynamics in FE chains

Abstract

A microscopic view of the response of the electric dipoles to a dynamic external field in a ferroelectric (FE) chain has been studied by two spin dynamics methods. One is the prominent micromagnetic approach, and the other is the micromagnetic approach with a variable size of the pseudo-spin. The energy stored in the ferroelectric chain is described by the transverse Ising model (TIM) with electric pseudo-spins. The simulations are based on a modified Landau-Lifshitz-Gilbert (LLG) equation which is precession free. The results obtained are shown and compared with the result supplemented by Landau-Devonshire (L-D) theory in the Appendix.