论文标题
Kagome晶格Heisenberg Antiferromagnet Zn-Barlowite（Zn $ _ {0.95} $ CU $ _ {0.05} $ _ {0.05} $ _ {3} $ _ {6} $ _ {6} $ fbr
Emergence of the spin polarized domains in the kagome lattice Heisenberg antiferromagnet Zn-barlowite (Zn$_{0.95}$Cu$_{0.05}$)Cu$_{3}$(OD)$_{6}$FBr
论文作者
论文摘要
已知Kagome Lattice Heisenberg抗铁磁铁对结构障碍引起的扰动高度敏感。 NMR是一种局部探测，非常适合研究这种疾病诱导的作用，但实际上，常规的一维NMR数据中的大型分布使得很难区分原始Kagome量子量子液与疾病诱导的效应的原始量子量子旋转期望的内在行为。 Here we report the development of a two-dimensional NMR data acquisition scheme applied to Zn-barlowite (Zn$_{0.95}$Cu$_{0.05}$)Cu$_{3}$(OD)$_{6}$FBr kagome lattice, and successfully correlate the distribution of the low energy spin excitations with that of the local spin susceptibility.我们提供了证据表明，域的局部自旋极化的逐渐增长，该域由5 \％cu $^{2+} $缺陷旋转占据了Interlayer非磁性Zn $^{2+} $ sites。这些自旋极化结构域在2〜K时解释了样品体积的$ \ sim60 $ \％，其中层间缺陷引起的无间隙激发主导了kagome平面内自旋激发的低能量部门。
Kagome lattice Heisenberg antiferromagnets are known to be highly sensitive to perturbations caused by structural disorder. NMR is a local probe ideally suited for investigating such disorder-induced effects, but in practice large distributions in the conventional one-dimensional NMR data make it difficult to distinguish the intrinsic behavior expected for pristine kagome quantum spin liquids from disorder induced effects. Here we report the development of a two-dimensional NMR data acquisition scheme applied to Zn-barlowite (Zn$_{0.95}$Cu$_{0.05}$)Cu$_{3}$(OD)$_{6}$FBr kagome lattice, and successfully correlate the distribution of the low energy spin excitations with that of the local spin susceptibility. We present evidence for the gradual growth of domains with a local spin polarization induced by 5\% Cu$^{2+}$ defect spins occupying the interlayer non-magnetic Zn$^{2+}$ sites. These spin polarized domains account for $\sim60$\% of the sample volume at 2~K, where gapless excitations induced by interlayer defects dominate the low energy sector of spin excitations within the kagome planes.
