论文标题
通过临界点对蜂窝磁铁进行化学调整
Chemical tuning of a honeycomb magnet through a critical point
论文作者
论文摘要
Baco2（ASO4）2（BCAO）自初次鉴定为近距离kitaev量子旋转液体液体以来就已经进行了广泛的研究。被认为是由高度各向异性XXZ-J_1-J_3模型描述的，在系统中抑制磁性顺序的易于性表示与自旋液相的接近度。通过通过部分砷替代钒的化学调整后，我们在BCAO系统中最初抑制了T = 3.0 K的长期不相差顺序，然后在较高的替代水平下增加了自旋冷冻。在这两个区域之间，在替换10％左右的情况下，该系统通过一个临界点，即竞争的J_1/J_3交换相互作用变得更加平衡，从而产生了更复杂的磁接地状态，可能通过量子波动稳定。该状态显示了如何利用磁性系统中的略微组成变化来调整基态归化性，并有可能实现量子旋转液态。
BaCo2(AsO4)2 (BCAO) has seen extensive study since its initial identification as a proximate Kitaev quantum spin liquid candidate. Thought to be described by the highly anisotropic XXZ-J_1-J_3 model, the ease with which magnetic order is suppressed in the system indicates proximity to a spin liquid phase. Upon chemical tuning via partial arsenic substitution with vanadium, we show an initial suppression of long-range incommensurate order in the BCAO system to T = 3.0 K, followed by increased spin freezing at higher substitution levels. Between these two regions, at around 10% substitution, the system is shown to pass through a critical point where the competing J_1/J_3 exchange interactions become more balanced, producing a more complex magnetic ground state, likely stabilized by quantum fluctuations. This state shows how slight compositional change in magnetically-frustrated systems may be leveraged to tune ground state degeneracies and potentially realize a quantum spin liquid state.
