paper

Electronic correlations and universal long-range scaling in kagome metals

arXiv:2203.05038

Abstract

We investigate the real-space profile of effective Coulomb interactions in correlated kagome materials. By particularizing to KV $_{3}$ Sb $_{5}$ , Co $_{3}$ Sn $_{2}$ S $_{2}$ , FeSn, and Ni $_{3}$ In, we analyze representative cases that exhibit a large span of correlation-mediated phenomena, and contrast them to prototypical prevoskite transition metal oxides. From our constrained random phase approximation studies we find that the on-site interaction strength in kagome metals not only depends on the screening processes at high energy, but also on the low-energy hybriziation profile of the electronic density of states. Our results indicate that rescaled by the onsite interaction amplitude, all kagome metals exhibit a universal long-range Coulomb behaviour.

7 pages, 3 figures