Probing the Interplay between Quantum Charge Fluctuations and Magnetic Ordering in LuFe2O4

TL;DR

This study uses ultrafast optical spectroscopy to reveal how quantum charge fluctuations influence the interaction between electric polarization and magnetic order in the multiferroic material LuFe2O4, advancing understanding of magnetoelectric coupling.

Contribution

It demonstrates that quantum charge fluctuations play a key role in the interplay between electric and magnetic properties in LuFe2O4, providing new insights into multiferroic mechanisms.

Findings

Quantum charge fluctuations govern electric-magnetic interplay

Ultrafast spectroscopy reveals microscopic coupling mechanisms

Enhanced understanding of multiferroic LuFe2O4

Abstract

Ferroelectric and ferromagnetic materials possess spontaneous electric and magnetic order, respectively, which can be switched by the corresponding applied electric and magnetic fields. Multiferroics combine these properties in a single material, providing an avenue for controlling electric polarization with a magnetic field and magnetism with an electric field. These materials have been intensively studied in recent years, both for their fundamental scientific interest as well as their potential applications in a broad range of magnetoelectric devices [1, 2, 3, 4]. However, the microscopic origins of magnetism and ferroelectricity are quite different, and the mechanisms producing strong coupling between them are not always well understood. Hence, gaining a deeper understanding of magnetoelectric coupling in these materials is the key to their rational design. Here, we use ultrafast optical spectroscopy to show that quantum charge fluctuations can govern the interplay between electric polarization and magnetic ordering in the charge-ordered multiferroic LuFe2O4.