Year: 2021
Type: article
Abstract: We present the development of a multi-resolution photoemission spectroscopy (MRPES) setup, which probes quantum materials in energy, momentum, space, and time. This versatile setup integrates three light sources in one photoemission setup and can conveniently switch between traditional angle-resolved photoemission spectroscopy (ARPES), time-resolved ARPES (trARPES), and micrometer-scale spatially resolved ARPES. It provides a first-time all-in-one solution to achieve an energy resolution of <4 meV, a time resolution of <35 fs, and a spatial resolution of ∼10 μm in photoemission spectroscopy. Remarkably, we obtain the shortest time resolution among the trARPES setups using solid-state nonlinear crystals for frequency upconversion. Furthermore, this MRPES setup is integrated with a shadow-mask assisted molecular beam epitaxy system, which transforms the traditional photoemission spectroscopy into a quantum device characterization instrument. We demonstrate the functionalities of this novel quantum material testbed using FeSe/SrTiO3 thin films and MnBi4Te7 magnetic topological insulators.
Source: Review of Scientific Instruments
DOI: 10.1063/5.0072979
Authors: Chenhui Yan, Emanuel Green, Riku Fukumori, Nikola Protic, Seng Huat Lee, Sebastian Fernandez-Mulligan, Rahim Raja, Robin Erdakos, Zhiqiang Mao, Shuolong Yang
Institutions: University of Chicago, Pennsylvania State University
Language: English
Subfield: Surfaces, Coatings and Films
Field: Materials Science
Domain: Physical Sciences
Open Access status: green
Awards: G2574328244, G2943824719
OpenAlex ID: W3204547046