Ferroelectricity from spin supercurrents in LiCuVO4

Mourigal, M.; Enderle, M.; Kremer, R. K.; Law, J. M.; Fak, B.

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Ferroelectricity from spin supercurrents in LiCuVO₄

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Kremer, R. K.
Former Scientific Facilities, Max Planck Institute for Solid State Research, Max Planck Society;

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Mourigal, M., Enderle, M., Kremer, R. K., Law, J. M., & Fak, B. (2011). Ferroelectricity from spin supercurrents in LiCuVO₄. Physical Review B, 83(10): 100409.

Cite as: https://hdl.handle.net/21.11116/0000-000E-BFF3-9

Abstract

We have studied the magnetic structure of the ferroelectric frustrated spin-1/2 chain material LiCuVO(4) in applied electric and magnetic fields using polarized neutrons. A symmetry and mean-field analysis of the data rules out the presence of static Dzyaloshinskii-Moriya interaction, while exchange striction is shown to be negligible by our specific-heat measurements. The experimentally observed magnetoelectric coupling is in excellent agreement with the predictions of a purely electronic mechanism based on spin supercurrents.