Electronic structure reconstruction in antiferromagnetically ordered TbTi3Bi4

Kagome materials have recently received significant attention as a promising platform for exploring novel quantum phenomena. TbTi3Bi4 has a bilayer Ti-based kagome lattice and has been shown to be a quasi-one-dimensional Ising magnet. Here, we present the result of our angle-resolved photoemission spectroscopy and density functional theory study of the electronic structure of TbTi3Bi4 in the paramagnetic and antiferromagnetic phases. We demonstrate an unexpected band splitting in the paramagnetic phase and a complex reconstruction of the electronic structure upon the antiferromagnetic transition.