论文标题
Ising三角晶格抗铁磁铁neododymium neptantalate中的量子自旋液体
Quantum spin liquid in the Ising triangular-lattice antiferromagnet neodymium heptatantalate
论文作者
论文摘要
在基本科学和应用科学中，被称为自旋液体的无序磁状态至关重要。半个多世纪前，预测了Ising抗磁磁三角模型的经典状态，而提出了其他非交换术语来诱导其量子版本 - 一种量子自旋液体。这些预测尚未通过实验确认。在这里，我们报告了在结构上完美的三角形抗fiferromagnet ndta $ _7 $ o $ o $ $ _ {19} $中发现这种状态的发现。它的磁接地状态的特征是自旋1/2的自由度，并具有类似ISING的相互作用，并引起低频自旋激发，持续到最低温度。我们的研究表明，强旋轨耦合在稳定型旋转液体中的关键作用，这些旋转液体由磁各向异性引起，并突出了大型稀有地点（re）hatpatantate reta $ _7 $ _7 $ o $ o $ _ {19} $作为实现这些状态的新型框架，这是这些状态的新框架，这代表了量子应用的有益平台。
Disordered magnetic states known as spin liquids are of paramount importance in both fundamental and applied science. A classical state of this kind was predicted for the Ising antiferromagnetic triangular model more than half a century ago, while additional non-commuting exchange terms were proposed to induce its quantum version -- a quantum spin liquid. These predictions have not been yet confirmed experimentally. Here we report a discovery of such a state in the structurally perfect triangular-lattice antiferromagnet NdTa$_7$O$_{19}$. Its magnetic ground state is characterized by spin-1/2 degrees of freedom with Ising-like interactions and gives rise to low-frequency spin excitations persisting down to the lowest temperatures. Our study demonstrates the key role of strong spin-orbit coupling in stabilizing spin liquids that result from magnetic anisotropy and highlights the large family of rare-earth (RE) heptatantalates RETa$_7$O$_{19}$ as a novel framework for realization of these states, which represent a promising platform for quantum applications.
