2003/10/06 by T. Masuda, A. Zheludev, Masuda, T. +7
Physics and Astronomy · #FOS: Physical sciences #Strongly Correlated Electrons (cond-mat.str-el) #cond-mat.str-el
paper · pdf · doi:10.48550/arxiv.cond-mat/0310126
4 pages 4 figures
arxiv created 2003/10/06 · arxiv updated 2009/12/01
Neutron diffraction and bulk measurements are used to determine the nature of the low-temperature ordered state in LiCu2O2, a S=1/2 spin-chain compound with competing interactions. The magnetic structure is found to be helimagnetic, with a propagation vector (0.5,ζ,0), ζ=0.174. The nearest-neighbor exchange constant and frustration ratio are estimated to be J=5.8 meV and J2/J1=0.29, respectively. For idealized spin chains these parameter values would signify a gapped spin-liquid ground state. Long-range ordering is attributed to intrinsic non-stoichiometry.