title: Spin-nematic and spin-density-wave orders in spatially anisotropic frustrated magnets in a magnetic field.
abstract: We develop a microscopic theory of finite-temperature spin-nematic orderings in three-dimensional spatially anisotropic magnets consisting of weakly coupled frustrated spin-1/2 chains with nearest-neighbor and next-nearest-neighbor couplings in a magnetic field. Combining a field theoretical technique with density-matrix renormalization group results, we complete finite-temperature phase diagrams in a wide magnetic-field range that possess spin-bond-nematic and incommensurate spin-density-wave ordered phases. The effects of a four-spin interaction are also studied. The relevance of our results to quasi-one-dimensional edge-shared cuprate magnets such as LiCuVO(4) is discussed.
authors.affiliation: Department of Physics and Mathematics, Aoyama Gakuin University, Sagamihara, Kanagawa 229-8558, Japan.
authors.forename: Masahiro
authors.initials: M
authors.lastname: Sato
authors.affiliation: Faculty of Engineering, Gunma University, Kiryu, Gunma 376-8515, Japan.
authors.forename: Toshiya
authors.initials: T
authors.lastname: Hikihara
authors.affiliation: Condensed Matter Theory Laboratory, RIKEN, Wako, Saitama 351-0198, Japan.
authors.forename: Tsutomu
authors.initials: T
authors.lastname: Momoi