Robust spin correlations at high magnetic fields in the harmonic honeycomb iridates.
Robust spin correlations at high magnetic fields in the harmonic honeycomb iridates.
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DOI：
10.1038/s41467-017-00264-6
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发表时间：
2017-08-01
影响因子：
16.6
通讯作者：
Shekhter A
中科院分区：
文献类型：
--
作者：
Modic KA;Ramshaw BJ;Betts JB;Breznay NP;Analytis JG;McDonald RD;Shekhter A
在蜂窝铱酸盐中观察到的复杂反铁磁序是寻找量子自旋液体的一把双刃剑：两者都证明了磁相互作用提供了许多必要的成分，同时也阻碍了进入。人们的注意力自然被吸引到暗示潜在自旋相关性的不寻常的磁顺序上。然而，对任何特定对称性破缺态的研究通常都无法提供关于附近其他基态存在可能性的线索。在这里，我们使用接近100特斯拉的磁场来揭示γ-铱酸锂的自旋相关程度。我们发现沿磁易轴的一小部分场熔化了长程序，显示出双稳态、强相关的自旋态。与通常通过自旋极化破坏反铁磁性不同的是，高场态只拥有总铱矩的一小部分，没有证据表明可以达到最高磁场的长程有序。在蜂窝铱酸盐中观察到的复杂反铁磁序阻止了进入自旋液体基态。在这里，作者应用极高的磁场破坏了γ-铱酸锂的反铁磁序，并揭示了双稳态、强相关的自旋态。
The complex antiferromagnetic orders observed in the honeycomb iridates are a double-edged sword in the search for a quantum spin-liquid: both attesting that the magnetic interactions provide many of the necessary ingredients, while simultaneously impeding access. Focus has naturally been drawn to the unusual magnetic orders that hint at the underlying spin correlations. However, the study of any particular broken symmetry state generally provides little clue about the possibility of other nearby ground states. Here we use magnetic fields approaching 100 Tesla to reveal the extent of the spin correlations in γ-lithium iridate. We find that a small component of field along the magnetic easy-axis melts long-range order, revealing a bistable, strongly correlated spin state. Far from the usual destruction of antiferromagnetism via spin polarization, the high-field state possesses only a small fraction of the total iridium moment, without evidence for long-range order up to the highest attainable magnetic fields. The complex antiferromagnetic orders observed in the honeycomb iridates prevent access to a spin-liquid ground state. Here the authors apply extremely high magnetic fields to destroy the antiferromagnetic order in γ-lithium iridate and reveal a bistable, strongly correlated spin state.
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影响因子：
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作者：
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通讯作者：
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影响因子：
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