Mourigal, MartinEnderle, MechthildKremer, Reinhard K.Law, Joseph M.Fåk, Björn2011-03-222011-03-222011-03-22201110.1103/PhysRevB.83.100409https://infoscience.epfl.ch/handle/20.500.14299/65593WOS:000288646100001We 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.MultiferroicsChaintext::journal::journal article::research article