标题： 铜基凯库勒金属中非常规磁性的理论 显示英文标题

标题： Theory of unconventional magnetism in a Cu-based kagome metal

摘要： Kagome金属为关联电子物理开辟了一个新的领域。 到目前为止，主要的实验证据集中在非常规电荷序、向列性和超导性上，而由于电子相互作用产生的磁涨落，即超出局域原子磁性的磁涨落，大多难以捉摸。 通过从头算设计和多体分析，我们开发了一个基于铜的Kagome材料的模型框架，其模拟揭示了Kagome金属中的非常规磁序。 我们发现，确定这种奇异序的适当参数范围的挑战集中在两个方面。 首先，由低能轨道所暗示的相关性必须足够大，以产生磁涨落的主导地位，同时又足够弱以保持巡游母态。 其次，费米能级处的运动学Kagome轮廓要求有效缓解导致来自电子局域排斥的磁涨落抑制的亚格子干扰。 我们通过分析所提出的化合物CsCu$_3$Cl$_5$来阐明我们的方法，评估其对未来材料合成的可行性。 显示英文摘要

摘要： Kagome metals have established a new arena for correlated electron physics. To date, the predominant experimental evidence centers around unconventional charge order, nematicity, and superconductivity, while magnetic fluctuations due to electronic interactions, i.e., beyond local atomic magnetism, have largely been elusive. From ab initio design and many-body analysis, we develop a model framework of Cu-based kagome materials the simulations of which reveal unconventional magnetic order in a kagome metal. We find the challenge of locating the appropriate parameter regime for such exotic order to center around two aspects. First, the correlations implied by low-energy orbitals have to be sufficiently large to yield a dominance of magnetic fluctuations and weak to retain an itinerant parent state. Second, the kinematic kagome profile at the Fermi level demands an efficient mitigation of sublattice interference causing the suppression of magnetic fluctuations descending from electronic onsite repulsion. We elucidate our methodology by analyzing the proposed compound CsCu$_3$Cl$_5$, assessing its feasibility for future material synthesis.