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Correlation between quantum charge fluctuations and magnetic ordering in multiferroic LuFe2O4

Regular Article

Abstract

We examine the interplay between quantum charge fluctuations and magnetic ordering in multiferroic LuFe2O4 and show that this can couple spin and charge degrees of freedom in a LuFe2O4 bilayer below the Neel temperature T N . Our analysis supports the idea that the double exchange mechanism normally used in metallic systems can be applied to charge-ordered insulators. This causes ferrimagnetic spin order to reduce the transfer integrals between Fe2+ and Fe3+ in LuFe2O4, decreasing charge fluctuations and increasing the polarization in this system below T N . This work thus provides a more detailed understanding of the mechanism for spin-charge coupling in LuFe2O4.

Keywords

Solid State and Materials 

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Copyright information

© EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg 2014

Authors and Affiliations

  1. 1.Center for Integrated NanotechnologiesLos Alamos National LaboratoryLos AlamosUSA

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