论文标题
XY链中缺陷的影响,边界条件沮丧
Effects of defects in the XY chain with frustrated boundary conditions
论文作者
论文摘要
最近已经证明,由于沮丧的边界条件,即带有奇数晶格位点和抗铁磁相互作用的新型批量,本地秩序可以随之而来。对于零外场中的量子XY链,已经发现通常的抗磁磁序被介质的铁磁铁或不稳定的AFM秩序所取代。在这项工作中,我们研究了这些新订单的弹性,以打破模型的翻译对称性的缺陷。我们发现,虽然铁磁缺陷恢复了传统的,交错的顺序,但AFM稳定了不可压力的顺序。沮丧的顺序对某些类型的缺陷的鲁棒性为其实验性观察性铺平了道路。
It has been recently proven that new types of bulk, local order can ensue due to frustrated boundary condition, that is, periodic boundary conditions with an odd number of lattice sites and anti-ferromagnetic interactions. For the quantum XY chain in zero external fields, the usual antiferromagnetic order has been found to be replaced either by a mesoscopic ferromagnet or by an incommensurate AFM order. In this work we examine the resilience of these new types of orders against a defect that breaks the translational symmetry of the model. We find that, while a ferromagnetic defect restores the traditional, staggered order, an AFM one stabilizes the incommensurate order. The robustness of the frustrated order to certain kinds of defects paves the way for its experimental observability.