论文标题
抗磁性Weyl半准MN3+XSN1-X膜中的近托物理学
Kondo physics in antiferromagnetic Weyl semimetal Mn3+xSn1-x films
论文作者
论文摘要
拓扑和较强的电子相关性是新兴量子材料中的关键成分，但它们在实验系统中的相交已经相对较限。密切相关的Weyl半法，尤其是当磁性掺入磁性时，提供了一个独特而肥沃的平台，可以探索新型拓扑问题和拓扑旋转的新兴现象。抗磁性Weyl半含量MN3SN表现出许多外来的物理特性，例如较大的自发性大厅效应，最近引起了强烈的兴趣。在这项工作中，我们报告了与散装样品相比，具有大大扩展组成范围的外延MN3+XSN1-X膜的合成。当SN原子被磁Mn原子取代时，近野效应是强烈相关，出现，发展连贯性并引起杂交能量差距的著名例子。磁性掺杂和间隙的开口导致了丰富的非凡特性，例如突出的DC Hall效应和共振增强的Terahertz Faraday旋转。
Topology and strong electron correlations are crucial ingredients in emerging quantum materials, yet their intersection in experimental systems has been relatively limited to date. Strongly correlated Weyl semimetals, particularly when magnetism is incorporated, offer a unique and fertile platform to explore emergent phenomena in novel topological matter and topological spintronics. The antiferromagnetic Weyl semimetal Mn3Sn exhibits many exotic physical properties such as a large spontaneous Hall effect and has recently attracted intense interest. In this work, we report synthesis of epitaxial Mn3+xSn1-x films with greatly extended compositional range in comparison with that of bulk samples. As Sn atoms are replaced by magnetic Mn atoms, the Kondo effect, which is a celebrated example of strong correlations, emerges, develops coherence, and induces a hybridization energy gap. The magnetic doping and gap opening lead to rich extraordinary properties as exemplified by the prominent DC Hall effects and resonance-enhanced terahertz Faraday rotation.
