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Correlation between quantum charge fluctuations and magnetic ordering in multiferroic LuFe2O4

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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.

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Authors and Affiliations

  1. Center for Integrated Nanotechnologies, Los Alamos National Laboratory, Los Alamos, 87545, NM, USA

    Jinho Lee & Rohit P. Prasankumar

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  1. Jinho Lee
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  2. Rohit P. Prasankumar
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Correspondence to Rohit P. Prasankumar.

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Lee, J., Prasankumar, R.P. Correlation between quantum charge fluctuations and magnetic ordering in multiferroic LuFe2O4 . Eur. Phys. J. B 87, 267 (2014). https://doi.org/10.1140/epjb/e2014-50177-2

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  • DOI: https://doi.org/10.1140/epjb/e2014-50177-2

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