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Partzsch S, Wilkins SB, Hill JP, et al. Observation of electronic ferroelectric polarization in multiferroic YMn2O5. Phys Rev Lett. 2011;107(5):057201doi: 10.1103/PhysRevLett.107.057201.
Partzsch, S., Wilkins, S. B., Hill, J. P., Schierle, E., Weschke, E., Souptel, D., Büchner, B., & Geck, J. (2011). Observation of electronic ferroelectric polarization in multiferroic YMn2O5. Physical review letters, 107(5), 057201. https://doi.org/10.1103/PhysRevLett.107.057201
Partzsch, S, et al. "Observation of electronic ferroelectric polarization in multiferroic YMn2O5." Physical review letters vol. 107,5 (2011): 057201. doi: https://doi.org/10.1103/PhysRevLett.107.057201
Partzsch S, Wilkins SB, Hill JP, Schierle E, Weschke E, Souptel D, Büchner B, Geck J. Observation of electronic ferroelectric polarization in multiferroic YMn2O5. Phys Rev Lett. 2011 Jul 29;107(5):057201. doi: 10.1103/PhysRevLett.107.057201. Epub 2011 Jul 25. PMID: 21867092.
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Phys Rev Lett. 2011 Jul 29;107(5):057201. doi: 10.1103/PhysRevLett.107.057201. Epub 2011 Jul 25.

Observation of electronic ferroelectric polarization in multiferroic YMn2O5.

Physical review letters

S Partzsch, S B Wilkins, J P Hill, E Schierle, E Weschke, D Souptel, B Büchner, J Geck

Affiliations

  1. Leibniz Institute for Solid State and Materials Research IFW Dresden, Helmholtzstrasse 20, 01069 Dresden, Germany.

PMID: 21867092 DOI: 10.1103/PhysRevLett.107.057201

Abstract

We report the observation of a magnetic polarization of the O 2p states in YMn(2)O(5) through the use of soft x-ray resonant scattering at the oxygen K edge. Remarkably, we find that the temperature dependence of the integrated intensity of this signal closely follows the macroscopic electric polarization, and hence is proportional to the ferroelectric order parameter. This is in contrast with the temperature dependence observed at the Mn L(3) edge, which reflects the Mn magnetic order parameter. First-principles calculations provide a microscopic understanding of these results and show that a spin-dependent hybridization of O 2p and Mn 3d states results in a purely electronic contribution to the ferroelectric polarization, which can exist in the absence of lattice distortions.

© 2011 American Physical Society

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