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Kagome metals are topological materials with a rich phase diagram featuringvarious charge density wave orders and even unconventional superconductivity.However, little is still known about possible spin-polarized responses in thesenon-magnetic compounds. Here, we perform ab-initio calculations of theintrinsic spin Hall effect (SHE) in the kagome metals AV$_3$Sb$_5$ (A=Cs, Rb,K), CsTi$_3$Bi$_5$ and ScV$_6$Sn$_6$. We report large spin Hall conductivities,comparable with the Weyl semimetal TaAs. Additionally, in CsV$_3$Sb$_5$ the SHEis strongly renormalized by the CDW order. We can understand these resultsbased on the topological properties of band structures, demonstrating that theSHE is dominated by the position and shape of the Dirac nodal lines in thekagome sublattice. Our results suggest kagome materials as a promising, tunableplatform for future spintronics applications.

Tuning the Intrinsic Spin Hall Effect by Charge Density Wave Order in Topological Kagome Metals