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Ferroelectricity from spin supercurrents in LiCuVO4

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arxiv 1103.4319 v1 pith:6LEW5Z2F submitted 2011-03-22 cond-mat.str-el cond-mat.mtrl-sci

Ferroelectricity from spin supercurrents in LiCuVO4

M. Mourigal , M. Enderle , R. K. Kremer , J. M. Law , B. F{\aa}k This is my paper
classification cond-mat.str-el cond-mat.mtrl-sci
keywords licuvo4magneticspinsupercurrentsagreementanalysisappliedchain
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We have studied the magnetic structure of the ferroelectric frustrated spin-1/2 chain material LiCuVO4 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.

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