Speaker
Description
The kagome lattice has attracted significant attention in the condensed matter community due to its rich sequence of emergent quantum phases, including chiral charge order, nematicity, superconductivity, and the anomalous Hall effect. Theoretical studies predict that these materials may host unconventional superconducting states, such as chiral superconductivity, making the experimental determination of the superconducting gap structure a critical objective. Muon spin rotation (${\mu}$SR) is a powerful technique for probing both the superfluid density and the symmetry of the superconducting gap deep within the bulk of a material. Here, I will present our recent efforts [1-5] to uncover the nature of superconductivity in the kagome compounds AV$_{3}$Sb$_{5}$, highlighting insights gained from μSR, ARPES, and STM, in combination with external tuning parameters such as chemical doping and applied pressure. Our experiments offer a growing body of evidence that points toward the possibility of unconventional superconductivity in this fascinating class of materials.
[1] C. Mielke III, et. al., and Z. Guguchia, Nature 602, 245 (2022).
[2] Z. Guguchia et. al., Nature Communications 14, 153 (2023).
[3] Z. Guguchia et. al., NPJ Quantum Materials 8, 41 (2023).
[4] J.N. Graham et. al., and Z. Guguchia, arXiv:2411.18744 (2024).
[5] H. Deng, Z. Guguchia et. al., Nature Materials 23, 1639 (2024).
[6] Y. Zhong, J. Liu, Z. Guguchia et. al., Nature 617, 488 (2023).
| Funding Agency | The Swiss National Science Foundation (SNSF) through SNSF Starting Grant (No. TMSGI2${\_}$211750). |
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| Did you request an Invitation Letter for a Visitors Visa Application | Yes |
