Magnetic field induced ordering in quasi-one-dimensional quantum magnets
Magnetic field induced ordering in quasi-one-dimensional quantum magnets
复制标题
准一维量子磁体中的磁场诱导排序
DOI：
10.1007/s100510070194
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发表时间：
1999
期刊：
影响因子：
--
通讯作者：
S. Haas
中科院分区：
文献类型：
--
作者：
S. Wessel;S. Haas
从理论上研究了强各向异性量子磁体中的三维磁有序转变。外磁场可以驱动具有自旋能隙的准一维子系统进入无能隙区，从而由于子系统之间的弱剩磁耦合而诱导长程三维磁有序。化合物具有较高的自旋自由度，如N-腿自旋1/2梯子，被证明有级联的顺序过渡。在高磁场下，准一维子系统内的零点波动被抑制，导致对有序温度的量子校正减少。
Three-dimensional magnetic ordering transitions are studied theoretically in strongly anisotropic quantum magnets. An external magnetic field can drive quasi-one-dimensional subsystems with a spin gap into a gapless regime, thus inducing long-range three-dimensional magnetic ordering due to weak residual magnetic coupling between the subsystems. Compounds with higher spin degrees of freedom, such asN-leg spin-1/2 ladders, are shown to have cascades of ordering transitions. At high magnetic fields, zero-point fluctuations within the quasi-1D subsystems are suppressed, causing quantum corrections to the ordering temperature to be reduced.