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Induced magnetism versus Kondo screening in alternating Mott-metal layers

机译:交替的Mott-metal层中的感应磁与Kondo屏蔽

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摘要

We investigate the magnetic properties of a heterostructure comprised of alternating metallic and Mott insulating layers of fermions with varying interlayer hybridization. Results from large-scale quantum Monte Carlo simulations at half-filling show clear evidence of induced magnetism in the metallic layers due to coupling to the Mott insulating layers at small to intermediate values of interlayer hopping. The in-plane magnetism is completely suppressed via a Kondo proximity effect when the coupling between adjacent layers is increased beyond a critical strength. The nature of the phase in the Kondo-like insulating regime is investigated and is shown to be dominated by simultaneous in-plane and interplane short-range correlations.
机译:我们研究了由交替变化的层间杂化的费米子的交替金属和莫特绝缘层组成的异质结构的磁性。半填充时大规模量子蒙特卡罗模拟的结果清楚地表明了金属层中感应磁化的证据,这是由于在层间跳变的小值到中间值处耦合到Mott绝缘层所致。当相邻层之间的耦合增加到超过临界强度时,通过近藤近距离效应完全抑制了面内磁性。研究了近藤状绝缘状态中的相的性质,并证明其由同时的面内和面间短程相关性支配。

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