Speaker
Description
Kagome materials have been the source of extensive recent studies for topological quantum matter with enhanced electronic correlation. Destructive interference of electronic hopping pathways in the geometrically frustrated Kagome lattice gives rise to signature topological bands near the Fermi level ($E_\mathrm{F}$), such as a doubly degenerate flat band, a Dirac cone, and van Hove singularities (vHSs). Here, we investigate the electronic and magnonic properties of B35-FeGe, an intriguing three-dimensional (3D) Kagome material that hosts charge density wave (CDW) and spin density wave (SDW) at low temperature. We demonstrate unique strain tunability of the vHSs, Dirac cone, the associated Berry curvatures and transport properties in the antiferromagnetic (AFM) B35-FeGe, which facilitates understanding of the highly correlated CDW. The uncovered strain tunability of topological features in 3D Kagome materials offers a rich platform for emerging topological electronics, spintronics and magnonics. Our work bodes well for significant experimental advancement in highly correlated states, magnetic interactions in intertwined quantum phases, and strain-driven topological phenomena.
The research was supported by Canada Research Chairs (CRC) Program, NSERC Discovery Grant RGPIN-2024-06497, ARO Grant Number W911NF-25-1-0215 and Digital Research Alliance of Canada.
| Keyword-1 | Kagome lattice |
|---|---|
| Keyword-2 | Strain-tunability |
| Keyword-3 | Electronic correlation |