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arXiv 1810.04431cond-mat.str-elcond-mat.supr-con
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量子自旋液体的磁场研究进展

Recent progress on magnetic-field studies on quantum-spin-liquid candidates

Zhen Ma, Kejing Ran, Jinghui Wang, Song Bao, Zhengwei Cai, Shichao Li, Jinsheng Wen

摘要:

量子自旋液体(QSL)代表了一种新的物质状态,在这种状态下,量子涨落阻止了传统磁序的建立,并且即使在零温度下,自旋也保持无序。有许多理论发展提出了各种QSL状态。另一方面,实验进展相对缓慢,主要是由于候选材料的限制和测量的困难。近年来,实验进度加快。在这篇专题综述中,我们简要总结了在磁场下的QSL候选者的实验。我们将我们的讨论分为两类:i)几何阻挫系统,包括三角晶格化合物YbMgGaO 4和YbZnGaO 4,kappa-(BEDT-TTF)2Cu 2(CN)3和EtMe 3Sb [Pd(dmit)2]2,以及kagome系统ZnCu 3(OH)6Cl 2; ii)Kitaev材料α-RuCl 3。其中,我们将特别注意alpha-RuCl 3,这是我们和其他小组最近深入研究的。我们将提出支持和不支持这些材料的QSL基态的证据,在此基础上,我们给出了几个观点,以刺激进一步的研究活动。

英文摘要:

Quantum spin liquids (QSLs) represent a novel state of matter in which quantum fluctuations prevent conventional magnetic order from being established, and the spins remain disordered even at zero temperature. There have been many theoretical developments proposing various QSL states. On the other hand, experimental movement was relatively slow largely due to limitations on the candidate materials and difficulties in the measurements. In recent years, the experimental progress has been accelerated. In this topical review, we give a brief summary of experiments on the QSL candidates under magnetic fields. We arrange our discussions by two categories: i) Geometrically-frustrated systems, including triangular-lattice compounds YbMgGaO4 and YbZnGaO4, kappa-(BEDT-TTF)2Cu2(CN)3, and EtMe3Sb[Pd(dmit)2]2, and kagome system ZnCu3(OH)6Cl2; ii) the Kitaev material alpha-RuCl3. Among these, we will pay special attention to alpha-RuCl3, which has been intensively studied by our and other groups recently. We will present evidence that both supports and unsupports the QSL ground state for these materials, based on which we give several perspectives to stimulate further research activities.

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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