Ferroelectricity from spin supercurrents in LiCuVO4

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.


Published in:
Physical Review B Condensed Matter, 83, 10, 100409(R)
Year:
2011
ISSN:
0163-1829
Keywords:
Laboratories:




 Record created 2011-03-22, last modified 2018-09-13


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