High-resolution three-dimensional spin- and angle-resolved photoelectron spectrometer using vacuum ultraviolet laser light
Year: 2016
Type: article
Abstract: We describe a spin- and angle-resolved photoelectron spectroscopy (SARPES) apparatus with a vacuum-ultraviolet (VUV) laser (hν = 6.994 eV) developed at the Laser and Synchrotron Research Center at the Institute for Solid State Physics, The University of Tokyo. The spectrometer consists of a hemispherical photoelectron analyzer equipped with an electron deflector function and twin very-low-energy-electron-diffraction-type spin detectors, which allows us to analyze the spin vector of a photoelectron three-dimensionally with both high energy and angular resolutions. The combination of the high-performance spectrometer and the high-photon-flux VUV laser can achieve an energy resolution of 1.7 meV for SARPES. We demonstrate that the present laser-SARPES machine realizes a quick SARPES on the spin-split band structure of a Bi(111) film even with 7 meV energy and 0.7(∘) angular resolutions along the entrance-slit direction. This laser-SARPES machine is applicable to the investigation of spin-dependent electronic states on an energy scale of a few meV.
Source: Review of Scientific Instruments
DOI: 10.1063/1.4948738
Authors: Koichiro Yaji, Ayumi Harasawa, Kenta Kuroda, Sogen Toyohisa, Mitsuhiro Nakayama, Yukiaki Ishida, Akiko Fukushima, Shuntaro Watanabe, Chuangtian Chen, Fumio Komori, Shik Shin
Language: English
Subfield: Surfaces, Coatings and Films
Field: Materials Science
Domain: Physical Sciences
Open Access status: green
Awards: Spin-polarized surface states of germanium substrate modified by surface adsorbates, Development of ultralow temperature and ultrahigh-resolution laser-based photoemission spectroscopy and investigation of the mechanism of exotic superconductors, Spin-polarized electronic states of one-dimensional metallic bands studied by time- and spin-resolved photoelectron spectroscopy, Spin-resolved STM and ARPES studies of spin-nano-physics at surfaces
OpenAlex ID: W2344392929