Nonrelativistic multiferrocity in the nonstoichiometric spin-12 spiral-chain cuprate LiCu2O2
A. S. Moskvin, Yu. D. Panov, S.-L. Drechsler
DOI 10.1103/PhysRevB.79.104112 · Physical Review B
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Abstract
Puzzling multiferroic behavior observed recently in spin-1/2 one-dimensional chain cuprate LiCu2O2 with edge-shared arrangement of CuO4 plaquettes and incommensurate spiral spin ordering is consistently explained to be a result of the nonrelativistic exchange-induced electric polarization on the Cu2+ centers substituting for the positions native for the Cu1+ ions. These substituent centers are proven to be an effective probe of the spin incommensurability and magnetic field effects.
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