论文标题
prznal $ _ {11} $ o $ $ _ {19} $中的无间隙三角晶格旋转候选候选者
Gapless triangular-lattice spin-liquid candidate in PrZnAl$_{11}$O$_{19}$
论文作者
论文摘要
量子自旋液体（QSL）是一种异国情调的状态，其中电子旋转高度纠缠，但即使在零温度下也会不断波动。与哈密顿模型相比，由于缺陷，诸如反静脉疾病，应变以及额外的相互作用或缺乏相互作用的瑕疵，模型QSL的实验实现一直具有挑战性。在这里，我们报告了对Prznal $ _ {11} $ o $ $ $ $ $ $ _ {19} $的多晶样品的磁敏感性，热力学，非弹性中子散射（INS）和MUON-SPIN松弛研究，其中PR $^{3+} $构成了理想的二维三维三维lattice。我们的结果表明，尽管大型反铁磁耦合（$ \ sim $ -10 K），该系统不会订购或冻结，而是不断降低到50 mk。此外，INS和特定的热数据表明Prznal $ _ {11} $ o $ _ {19} $最好将其描述为无间隙QSL。
A quantum spin liquid (QSL) is an exotic state in which electron spins are highly entangled, yet keep fluctuating even at zero temperature. Experimental realization of model QSLs has been challenging due to imperfections, such as antisite disorder, strain, and extra or a lack of interactions in real materials compared to the model Hamiltonian. Here we report the magnetic susceptibility, thermodynamic, inelastic neutron scattering (INS), and muon-spin relaxation studies on a polycrystalline sample of PrZnAl$_{11}$O$_{19}$, where the Pr$^{3+}$ ions form an ideal two-dimensional triangular lattice. Our results demonstrate that this system does not order nor freeze, but keep fluctuating down to 50 mK despite large antiferromagnetic couplings ($\sim$ -10 K). Furthermore, the INS and specific-heat data suggest that PrZnAl$_{11}$O$_{19}$ is best described as a gapless QSL.
