2016/07/31 by H.‐J. Grafe, H. -J. Grafe, Satoshi Nishimoto +21 · 1 citation
Physics and Astronomy · #Advanced Condensed Matter Physics #Anisotropy #Condensed matter physics #Cuprate #Ferromagnetism #Field (mathematics) #Liquid crystal #Magnetic field #Magnetism #Magnetization #Physics #Physics of Superconductivity and Magnetism #Quantum mechanics #Spin (aerodynamics) #Superconductivity #Theoretical and Computational Physics #cond-mat.str-el
paper · pdf · doi:10.1038/s41598-017-06525-0
published as revised version published in Sci. Rep. 7, 6729 (2017)
arxiv created 2016/12/27 · openalex publication_date 2017/07/21 · openalex created_date 2017/07/31 · arxiv updated 2017/10/26 · openalex updated_date 2026/08/05
Abstract Modern theories of quantum magnetism predict exotic multipolar states in weakly interacting strongly frustrated spin-1/2 Heisenberg chains with ferromagnetic nearest neighbor (NN) inchain exchange in high magnetic fields. Experimentally these states remained elusive so far. Here we report strong indications of a magnetic field-induced nematic liquid arising above a field of ~13 T in the edge-sharing chain cuprate LiSbCuO 4 ≡ LiCuSbO 4 . This interpretation is based on the observation of a field induced spin-gap in the measurements of the 7 Li NMR spin relaxation rate T 1 −1 as well as a contrasting field-dependent power-law behavior of T 1 −1 vs. T and is further supported by static magnetization and ESR data. An underlying theoretical microscopic approach favoring a nematic scenario is based essentially on the NN XYZ exchange anisotropy within a model for frustrated spin-1/2 chains and is investigated by the DMRG technique. The employed exchange parameters are justified qualitatively by electronic structure calculations for LiCuSbO 4 .