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arXiv 1808.04306cond-mat.mes-hall
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量子霍尔系统中磁序与磁序的反常耦合

Anomalous coupling between magnetic and nematic orders in quantum Hall systems

Md. Shafayat Hossain, M. A. Mueed, Meng K. Ma, Y. J. Chung, L. N. Pfeiffer, K. W. West, K. W. Baldwin, M. Shayegan

摘要:

不同阶之间的相互作用在物理学中具有根本的重要性。自发的、破坏电荷序的电荷序,负责条纹或条纹相,在许多存在强关联的情况下,如高温超导和量子霍尔效应,一直受到极大的关注。在这篇文章中,我们展示了一个意想不到的结果,在相互作用的二维电子系统中,鲁棒性的相位,这代表了一个顺序的电荷自由度,不仅取决于最高的,半满朗道能级的轨道指数,但它也是强烈相关的磁秩序的系统。有趣的是,当系统被完全磁化时,与先前在量子霍尔系统中观察到的磁相相比,磁相特别坚固,并且持续到更高的温度。我们的研究结果提供了基本的新的洞察磁化的作用,在稳定的相位,同时也提供了一个新的旋钮,它可以有效地调整。

英文摘要:

The interplay between different orders is of fundamental importance in physics. The spontaneous, symmetry-breaking charge order, responsible for the stripe or the nematic phase, has been of great interest in many contexts where strong correlations are present, such as high-temperature superconductivity and quantum Hall effect. In this article we show the unexpected result that in an interacting two-dimensional electron system, the robustness of the nematic phase, which represents an order in the charge degree of freedom, not only depends on the orbital index of the topmost, half-filled Landau level, but it is also strongly correlated with the magnetic order of the system. Intriguingly, when the system is fully magnetized, the nematic phase is particularly robust and persists to much higher temperatures compared to the nematic phases observed previously in quantum Hall systems. Our results give fundamental new insight into the role of magnetization in stabilizing the nematic phase, while also providing a new knob with which it can be effectively tuned.

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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