Detecting the full photoemission cone from laser-based ARPES experiments by leveraging deflector technology

Abstract

Angle-resolved photoemission spectroscopy (ARPES) provides a direct access to the electronic band structure of solid and molecular systems. The momentum range accessible by this technique depends directly on the photon energy used, and low-photon-energy sources are insufficient to photoemit electrons over the full Brillouin zone of most quantum materials. In addition, while electrons are emitted over a 2$\pi$ solid angle, conventional hemispherical analyzers only collect a small subset of those electrons. A previous work [RSI 92, 123907 (2021)] demonstrated that electrons emitted over a larger field-of-view can be acquired in one fixed configuration by accelerating them towards the analyzer with a bias voltage. Here, we extend this work by leveraging the deflector technology of novel ARPES hemispherical analyzers. We demonstrate the ability to detect all $2\pi$ photoemitted electrons in a fixed configuration for various materials such as gold, cuprates and transition-metal dichalcogenides. This approach is especially advantageous for time-resolved ARPES, as electron dynamics over a large momentum range can be accessed with identical measurement conditions.

References in corpus (15)

• Electronic structure of quantum materials studied by angle-resolved photoemission spectroscopy
• Probing the Low-Energy Electronic Structure of Complex Systems by ARPES
• Orbital-Dependent Electron Correlation in Double-Layer Nickelate La3Ni2O7
• Time- and Angle-Resolved Photoemission Studies of Quantum Materials
• Vacuum space charge effect in laser-based solid-state photoemission spectroscopy
• Tuning time and energy resolution in time-resolved photoemission spectroscopy with nonlinear crystals
• Advancing time- and angle-resolved photoemission spectroscopy: The role of ultrafast laser development
• Functions to map photoelectron distributions in a variety of setups in angle-resolved photoemission spectroscopy
• Expanding the momentum field of view in angle-resolved photoemission systems with hemispherical analyzers
• Multi-Mode Lens for Momentum Microscopy and XPEEM: Theory
• Band Structure and Fermi Surface Nesting in $LaS{b}_2$
• Analysis methodology of coherent oscillations in time- and angle-resolved photoemission spectroscopy
• Control of intervalley scattering in Bi${}_2$Te${}_3$ via temperature-dependent band renormalization
• Expansion of Momentum Space and Full 2$\pi$ Solid Angle Photoelectron Collection in Laser-Based Angle-Resolved Photoemission Spectroscopy by Applying Sample Bias
• Band structure of Bi surfaces formed on Bi2Se3 upon exposure to air