12 papers · 1 filter
Nonrelativistic Multiferroicity in the Nonstoichiometric Spin s=1/2 Spiral Chain Cuprate LiCu2O2
A. S. Moskvin, Yu. D. Panov, S. -L. Drechsler
We argue for a recently observed puzzling multiferroic behavior in s=1/2 1D chain cuprate LiCu2O2 with edge-shared arrangement of CuO4 plaquettes and incommensurate spiral spin ord…
Multiferroicity due to nonstoichiometry in the chain cuprate LiVCuO_4
A. S. Moskvin, S. -L. Drechsler
The recently observed multiferroic behavior in the s=1/2 chain cuprate LiVCuO_4 (LiCuVO_4) with edge-shared CuO_4 plaquettes and helical spin ordering does not agree with the exist…
Microscopic mechanisms of spin-dependent electric polarization in 3d oxides
A. S. Moskvin, S. -L. Drechsler
We address a systematic microscopic theory of spin-dependent electric polarization in 3d oxides starting with a generic three-site two-hole cluster. A perturbation scheme realistic…
Dzyaloshinsky-Moriya antisymmetric exchange coupling in cuprates: Oxygen effects
A. S. Moskvin
We revisit a problem of Dzyaloshinsky-Moriya antisymmetric exchange coupling for a single bond in cuprates specifying the local spin-orbital contributions to Dzyaloshinsky vector f…
Charge states of strongly correlated 3d oxides: from typical insulator to unconventional electron-hole Bose liquid
A. S. Moskvin
We develop a model approach to describe charge fluctuations and different charge phases in strongly correlated 3d oxides. As a generic model system one considers that of centers ea…
Comment on "Competition between helimagnetism and commensurate quantum spin correlations in LiCu2O2"
S. -L. Drechsler, J. Malek, J. Richter +3
The microscopic origin of the recently observed helical structure in LiCu2O2 [1] is considered. It is shown that the frustrated antiferromagnetic double chain scenario adopted in R…