Improvement of image-type very-low-energy-electron-diffraction spin polarimeter.
Rev Sci Instrum
; 94(7)2023 Jul 01.
Article
em En
| MEDLINE
| ID: mdl-37449894
ABSTRACT
Spin- and angle-resolved photoemission spectroscopy (SARPES) with high efficiency and resolution plays a crucial role in exploring the fine spin-resolved band structures of quantum materials. Here, we report the performance of the SARPES instrument with a second-generation home-made multichannel very-low-energy-electron-diffraction spin polarimeter. Its energy and angular resolutions achieve 7.2 meV and 0.52°, respectively. We present the results of SARPES measurements of Bi(111) film to demonstrate its performance. Combined with the density functional theory calculations, the spin polarization of the bulk states was confirmed by the spin-layer locking caused by the local inversion asymmetry. The surface states at a binding energy of 0.77 eV are found with 1.0 ± 0.11 spin polarization. Better resolutions and stability compared with the first-generation one provide a good platform to investigate the spin-polarized electronic states in materials.
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01-internacional
Base de dados:
MEDLINE
Assunto principal:
Elétrons
Idioma:
En
Revista:
Rev Sci Instrum
Ano de publicação:
2023
Tipo de documento:
Article