Kagome metals are topological materials with a rich phase diagram featuring various charge density wave orders and even unconventional superconductivity. However, little is still known about possible spin-polarized responses in these non-magnetic compounds. Here, we perform ab-initio calculations of the intrinsic spin Hall effect (SHE) in the kagome metals AV3Sb5 (A=Cs, Rb, K), CsTi3Bi5 and ScV6Sn6. We report large spin Hall conductivities, comparable with the Weyl semimetal TaAs. Additionally, in CsV3Sb5 the SHE is strongly renormalized by the CDW order. We can understand these results based on the topological properties of band structures, demonstrating that the SHE is dominated by the position and shape of the Dirac nodal lines in the kagome sublattice. Our results suggest kagome materials as a promising, tunable platform for future spintronics applications.
@article{arxiv.2307.06230,
title = {Tuning the Intrinsic Spin Hall Effect by Charge Density Wave Order in Topological Kagome Metals},
author = {Diana Golovanova and Hengxin Tan and Tobias Holder and Binghai Yan},
journal= {arXiv preprint arXiv:2307.06230},
year = {2024}
}