Department of Physics and Mathematics, Aoyama Gakuin University, Sagamihara, Kanagawa 229-8558, Japan.
Faculty of Engineering, Gunma University, Kiryu, Gunma 376-8515, Japan.
Phys Rev Lett. 2013 Feb 15;110(7):077206. doi: 10.1103/PhysRevLett.110.077206.
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.
我们发展了一种微观理论，用于研究三维各向异性磁体中有限温度的自旋向列有序，该磁体由弱耦合的 frustrated spin-1/2 链组成，在磁场中具有最近邻和次近邻耦合。通过结合场论技术和密度矩阵重整化群的结果，我们在很宽的磁场范围内完成了有限温度相图的绘制，其中包含自旋-键-向列和非调谐自旋密度波有序相。我们还研究了四自旋相互作用的影响。我们的结果与类一维的共享边铜酸盐磁体（如 LiCuVO(4)）有关，讨论了其相关性。
