Correlation between spin helicity and electric polarization vector in quantum-spin chain magnet LiCu${}_2$O${}_2$

S. Seki, Y. Yamasaki, M. Soda +3

Measurements of polarized neutron scattering were performed on a $S=1/2$ chain multiferroic LiCu${}_2$O${}_2$. In the ferroelectric ground state with the spontaneous polarization along…