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arXiv 2109.04102cond-mat.str-elcond-mat.mtrl-sci
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K $_2$ Ni $_2$(SO $_4$)$_3$双耦合万亿晶格中磁场诱导的量子自旋液体

Magnetic field induced quantum spin liquid in the two coupled trillium lattices of K$_2$Ni$_2$(SO$_4$)$_3$

Ivica Zivkovic, Virgile Favre, Catalina Salazar Mejia, Harald O. Jeschke, Arnaud Magrez, Bhupen Dabholkar, Vincent Noculak, Rafael S. Freitas, Minki Jeong, Naga… 展开作者

Ivica Zivkovic, Virgile Favre, Catalina Salazar Mejia, Harald O. Jeschke, Arnaud Magrez, Bhupen Dabholkar, Vincent Noculak, Rafael S. Freitas, Minki Jeong, Nagabhushan G. Hegde, Luc Testa, Peter Babkevich, Yixi Su, Pascal Manuel, Hubertus Luetkens, Christopher Baines, Peter J. Baker, Jochen Wosnitza, Oksana Zaharko, Yasir Iqbal, Johannes Reuther, Henrik M. Rønnow

摘要:

量子自旋液体是一种奇异的物质状态,当强烈的受抑磁相互作用诱导出一种远低于磁相互作用能量标度的高度纠缠的量子顺磁体时,就会形成这种物质状态。由于量子涨落的影响显著减少,三维情况尤其具有挑战性。在这里,我们报告的磁性表征{ \kni }形成一个三维网络的镍$^{2+}$自旋。使用密度泛函理论计算,我们表明,该网络由两个相互连接的自旋1万亿晶格。在没有磁场的情况下,磁化强度,比热,中子散射和μ子自旋弛豫实验表明,一个高度相关的动态,共存的一个特殊的,非常小的静态组件表现出强烈的重整化时刻。磁场$B \gtrsim 4$ T减少了有序分量,并驱动系统处于纯量子自旋液体状态。这表明互连的$S=1$ trillium晶格的系统表现出显著提高的几何挫折水平。

英文摘要:

Quantum spin liquids are exotic states of matter which form when strongly frustrated magnetic interactions induce a highly entangled quantum paramagnet far below the energy scale of the magnetic interactions. Three-dimensional cases are especially challenging due to the significant reduction of the influence of quantum fluctuations. Here, we report the magnetic characterization of {\kni} forming a three dimensional network of Ni$^{2+}$ spins. Using density functional theory calculations we show that this network consists of two interconnected spin-1 trillium lattices. In the absence of a magnetic field, magnetization, specific heat, neutron scattering and muon spin relaxation experiments demonstrate a highly correlated and dynamic state, coexisting with a peculiar, very small static component exhibiting a strongly renormalized moment. A magnetic field $B \gtrsim 4$ T diminishes the ordered component and drives the system in a pure quantum spin liquid state. This shows that a system of interconnected $S=1$ trillium lattices exhibit a significantly elevated level of geometrical frustration.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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