Correlated states in β-Li(2)IrO(3) driven by applied magnetic fields.
Correlated states in β-Li(2)IrO(3) driven by applied magnetic fields.
复制标题
DOI：
10.1038/s41467-017-01071-9
复制
发表时间：
2017-10-16
影响因子：
16.6
通讯作者：
Analytis JG
中科院分区：
文献类型：
--
作者：
Ruiz A;Frano A;Breznay NP;Kimchi I;Helm T;Oswald I;Chan JY;Birgeneau RJ;Islam Z;Analytis JG
磁性蜂窝状虹彩被认为表现出强烈的自旋各向异性交换相互作用，当高度受挫时，导致被称为Kitaev量子自旋液体的奇异物质状态。然而，在所有已知的例子中，这些材料在有限的温度下磁有序，其规模可能意味着弱挫折。本文证明了在相对较小的磁场作用下，三维磁体β-Li_2IrO_3从其无公度基态转变为量子关联顺磁体.有趣的是，这种顺磁状态混合了类似于其他Mott-Kitaev化合物中所见之字形顺序的之字形自旋模式。场诱导关联态的快速发生意味着交换相互作用是微妙的平衡，导致强烈的挫折和不同基态的近简并。具有Kitaev自旋液体基态的材料被寻求作为量子相的模型，但到目前为止，候选者形成锯齿形或无公度磁序。Ruiz等人在β-Li 2 IrO 3中发现了弱磁场下这些状态之间的交叉，表明强烈的受抑自旋相互作用。
Magnetic honeycomb iridates are thought to show strongly spin-anisotropic exchange interactions which, when highly frustrated, lead to an exotic state of matter known as the Kitaev quantum spin liquid. However, in all known examples these materials magnetically order at finite temperatures, the scale of which may imply weak frustration. Here we show that the application of a relatively small magnetic field drives the three-dimensional magnet β-Li2IrO3 from its incommensurate ground state into a quantum correlated paramagnet. Interestingly, this paramagnetic state admixes a zig-zag spin mode analogous to the zig-zag order seen in other Mott-Kitaev compounds. The rapid onset of the field-induced correlated state implies the exchange interactions are delicately balanced, leading to strong frustration and a near degeneracy of different ground states. Materials with a Kitaev spin liquid ground state are sought after as models of quantum phases but candidates so far form either zig-zag or incommensurate magnetic order. Ruiz et al. find a crossover between these states in β-Li2IrO3 under weak magnetic fields, indicating strongly frustrated spin interactions.
登录
查看更多内容
影响因子：
8.6
作者：
CHATTOPADHYAY, T;BROWN, PJ;VONSCHNERING, HG
通讯作者：
VONSCHNERING, HG
影响因子：
3.7
作者：
Feng, Yejun;Silevitch, D. M.;Rosenbaum, T. F.
通讯作者：
Rosenbaum, T. F.
影响因子：
8.6
作者：
Kiryukhin, V;Keimer, B;Vigliante, A
通讯作者：
Vigliante, A
影响因子：
3.7
作者：
Krimmel, A.;Strempfer, J.;Zimmermann, M. V.
通讯作者：
Zimmermann, M. V.
影响因子：
16.6
作者：
Modic, K. A.;Smidt, Tess E.;Analytis, James G.
通讯作者：
Analytis, James G.