New Developments in Laser-Based Photoemission Spectroscopy and its Scientific Applications: a Key Issues Review

TL;DR

This review discusses recent advances in deep ultraviolet laser-based ARPES techniques, highlighting their enhanced capabilities and applications in studying complex quantum materials like superconductors and topological insulators.

Contribution

It summarizes the latest developments in DUV laser-based ARPES and explores their scientific applications, offering insights into future research directions.

Findings

Enhanced energy and momentum resolution in ARPES

Successful application in studying unconventional superconductors

Advancements in spin-resolved and time-resolved ARPES

Abstract

The significant progress in angle-resolved photoemission spectroscopy (ARPES) in last three decades has elevated it from a traditional band mapping tool to a precise probe of many-body interactions and dynamics of quasiparticles in complex quantum systems. The recent developments of deep ultraviolet (DUV, including ultraviolet and vacuum ultraviolet) laser-based ARPES have further pushed this technique to a new level. In this paper, we review some latest developments in DUV laser-based photoemission systems, including the super-high energy and momentum resolution ARPES, the spin-resolved ARPES, the time-of-flight ARPES, and the time-resolved ARPES. We also highlight some scientific applications in the study of electronic structure in unconventional superconductors and topological materials using these state-of-the-art DUV laser-based ARPES. Finally we provide our perspectives on the future directions in the development of laser-based photoemission systems.