Electronic Landscape of Kagome Superconductors $\textit{A}$V$_{3}$Sb$_{5}$ ($\textit{A}$ = K, Rb, Cs) from Angle-Resolved Photoemission Spectroscopy

TL;DR

This paper reviews the electronic structure of kagome superconductors A V3Sb5 using ARPES, highlighting their complex interplay of superconductivity, charge order, and topology, and emphasizing the importance of understanding their electronic properties.

Contribution

It provides a comprehensive survey of ARPES studies on A V3Sb5, offering new insights into their electronic structure and guiding future research in kagome physics.

Findings

Identification of key electronic features via ARPES

Insights into charge density wave and topological states

Implications for superconducting pairing mechanisms

Abstract

The recently discovered layered kagome superconductors $\textit{A}$V$_{3}$Sb$_{5}$ ($\textit{A}$ = K, Rb, Cs) have garnered significant attention, as they exhibit an intriguing combination of superconductivity, charge density wave (CDW) order, and nontrivial band topology. As such, these kagome systems serve as an exceptional quantum platform for investigating the intricate interplay between electron correlation effects, geometric frustration, and topological electronic structure. A comprehensive understanding of the underlying electronic structure is crucial for unveiling the nature and origin of the CDW order, as well as determining the electron pairing symmetry in the kagome superconductors. In this review, we present a concise survey of the electronic properties of $\textit{A}$V$_{3}$Sb$_{5}$, with a particular focus on the insights derived from angle-resolved photoemission spectroscopy (ARPES). Through the lens of ARPES, we shed light on the electronic characteristics of the kagome superconductors $\textit{A}$V$_{3}$Sb$_{5}$, which will pave the way for exciting new research frontiers in kagome-related physics.