Beyond kagome: $p$-bands in kagome metals

TL;DR

This paper reviews how $p$-bands from elements outside the kagome network influence electronic instabilities like charge-density waves and superconductivity in kagome metals, expanding understanding beyond the traditional kagome $d$-band focus.

Contribution

It highlights the significant role of $p$-bands in kagome metals, which has been underappreciated in previous studies focusing mainly on $d$-bands.

Findings

$p$-bands contribute to electronic instabilities in kagome metals.

Elements beyond the kagome network influence charge-density waves.

Superconductivity in kagome metals involves $p$-band interactions.

Abstract

We review recent studies on quantum materials where transition-metal atoms give rise to $d$-bands typical of kagome metals. Using examples from several material families - AV$_3$Sb$_5$, FeGe, RV$_6$Sn$_6$, and LaRu$_3$Si$_2$ - we argue that $p$-bands contributed by elements beyond the kagome network also play a crucial role in the electronic instabilities, including the charge-density-waves and superconductivity in kagome metals.