Kondo physics in antiferromagnetic Weyl semimetal Mn3+xSn1−x films
作者： S. X. Huang , Jiadong Zang , Weigang Wang , James M. Kikkawa , Sebastian Hurtado Parra
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摘要: Topology and strong electron correlations are crucial ingredients in emerging quantum materials, yet their intersection experimental systems has been relatively limited to date. Strongly correlated Weyl semimetals, particularly when magnetism is incorporated, offer a unique fertile platform explore emergent phenomena novel topological matter spintronics. The antiferromagnetic semimetal Mn3Sn exhibits many exotic physical properties such as large spontaneous Hall effect recently attracted intense interest. In this work, we report synthesis of epitaxial Mn3+x Sn1-x films with greatly extended compositional range comparison that bulk samples. As Sn atoms replaced by magnetic Mn atoms, the Kondo effect, which celebrated example correlations, emerges, develops coherence, induces hybridization energy gap. doping gap opening lead rich extraordinary properties, exemplified prominent DC effects resonance-enhanced terahertz Faraday rotation.
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