AI Article Synopsis
- Topology and strong electron correlations are key elements in new quantum materials, but their study together in experiments is still limited.
- Strongly correlated Weyl semimetals with magnetism, like antiferromagnetic MnSn, provide a unique opportunity to investigate new phenomena in topological materials and spintronics.
- The research highlights the successful synthesis of epitaxial MnSn films with a broader composition range, showing that as magnetic Mn replaces Sn, strong correlations lead to effects like the Kondo effect and significant changes in electronic properties, which are demonstrated by notable DC Hall effects and enhanced terahertz Faraday rotation.
Article Abstract
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 MnSn 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 Mn Sn 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.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7455184 | PMC |
| http://dx.doi.org/10.1126/sciadv.abc1977 | DOI Listing |
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