论文标题
GASI-1D磁铁conb $ _2 $ o $ _6 $中的滑行对称性破坏和伊辛的关键
Glide symmetry breaking and Ising criticality in the quasi-1D magnet CoNb$_2$O$_6$
论文作者
论文摘要
我们为准-1D iSing Magnet conb $ _2 $ o $ _6 $构造了一个微观自旋交换哈密顿量，该磁铁conb $ _6 $，可捕获其动态旋转结构因子的详细且迄今为止无法解决的方面。我们执行对称分析，该分析回想起该材料中的单个Ising链被扣为弯曲，每个单位细胞中有两个位点与滑行对称性相关。将其与与中子散射实验的数值模拟相结合，我们认为单链哈密顿量包含交错的自旋交换项。我们进一步认为，conb $ _2 $ o $ _6 $中的横向式量子量临界点对应于打破这种滑行对称性，而不是以前认为的现场ising对称性。这给出了在高横向场的偏振相中，在有序阶段和“准颗粒分解”中对统一的微观解释。
We construct a microscopic spin-exchange Hamiltonian for the quasi-1D Ising magnet CoNb$_2$O$_6$ that captures detailed and hitherto-unexplained aspects of its dynamic spin structure factor. We perform a symmetry analysis that recalls that an individual Ising chain in this material is buckled, with two sites in each unit cell related by a glide symmetry. Combining this with numerical simulations benchmarked against neutron scattering experiments, we argue that the single-chain Hamiltonian contains a staggered spin-exchange term. We further argue that the transverse-field-tuned quantum critical point in CoNb$_2$O$_6$ corresponds to breaking this glide symmetry, rather than an on-site Ising symmetry as previously believed. This gives a unified microscopic explanation of the dispersion of confined states in the ordered phase and `quasiparticle breakdown' in the polarized phase at high transverse field.
