量子物质中的回路电流

IF 1.3 4区 物理与天体物理 Q3 ASTRONOMY & ASTROPHYSICS Comptes Rendus Physique Pub Date : 2021-03-24 DOI:10.5802/crphys.84
P. Bourges, D. Bounoua, Y. Sidis
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引用次数: 13

摘要

在许多量子材料中,强电子相关性导致物质新状态的出现。特别是,近几十年来对高温超导铜酸盐复杂相图的研究突出了单元内电子不稳定性,打破了离散的类伊辛对称性,同时保持了晶格平移不变性。极化中子衍射实验提供了令人信服的证据,支持一种新的单位胞内磁性形式,伴随着这些材料的所谓赝隙状态而出现。这一观察结果目前被解释为单位胞内环电流顺序的磁性标志,打破了宇称和时间反转对称性。更一般地说,这种磁电状态可能存在于比超导铜更广泛的量子材料中。例如,已经在空穴掺杂的莫特绝缘铱酸盐或空穴掺杂的两腿阶梯铜酸盐的自旋液态中观察到这种现象。
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Loop currents in quantum matter
In many quantum materials, strong electron correlations lead to the emergence of new states of matter. In particular, the study in the last decades of the complex phase diagram of high temperature superconducting cuprates highlighted intra-unit-cell electronic instabilities breaking discrete Ising-like symmetries, while preserving the lattice translation invariance. Polarized neutron diffraction experiments have provided compelling evidences supporting a new form of intra-unit-cell magnetism, emerging concomitantly with the so-called pseudogap state of these materials. This observation is currently interpreted as the magnetic hallmark of an intra-unit-cell loop current order, breaking both parity and time-reversal symmetries. More generally, this magneto-electric state is likely to exist in a wider class of quantum materials beyond superconducting cuprates. For instance, it has been already observed in hole-doped Mott insulating iridates or in the spin liquid state of hole-doped 2-leg ladder cuprates.
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来源期刊
Comptes Rendus Physique
Comptes Rendus Physique 物理-天文与天体物理
CiteScore
2.80
自引率
0.00%
发文量
13
审稿时长
17.2 weeks
期刊介绍: The Comptes Rendus - Physique are an open acess and peer-reviewed electronic scientific journal publishing original research article. It is one of seven journals published by the Académie des sciences. Its objective is to enable researchers to quickly share their work with the international scientific community. The Comptes Rendus - Physique also publish journal articles, thematic issues and articles on the history of the Académie des sciences and its current scientific activity. From 2020 onwards, the journal''s policy is based on a diamond open access model: no fees are charged to authors to publish or to readers to access articles. Thus, articles are accessible immediately, free of charge and permanently after publication. The Comptes Rendus - Physique (8 issues per year) cover all fields of physics and astrophysics and propose dossiers. Thanks to this formula, readers of physics and astrophysics will find, in each issue, the presentation of a subject in particularly rapid development. The authors are chosen from among the most active researchers in the field and each file is coordinated by a guest editor, ensuring that the most recent and significant results are taken into account. In order to preserve the historical purpose of the Comptes Rendus, these issues also leave room for the usual notes and clarifications. The articles are written mainly in English.
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