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.
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May 2016
Research Article|
May 12 2016
High-resolution three-dimensional spin- and angle-resolved photoelectron spectrometer using vacuum ultraviolet laser light
Koichiro Yaji;
Koichiro Yaji
a)
1Institute for Solid State Physics,
The University of Tokyo
, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8581, Japan
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Ayumi Harasawa;
Ayumi Harasawa
1Institute for Solid State Physics,
The University of Tokyo
, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8581, Japan
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Kenta Kuroda;
Kenta Kuroda
1Institute for Solid State Physics,
The University of Tokyo
, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8581, Japan
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Sogen Toyohisa;
Sogen Toyohisa
1Institute for Solid State Physics,
The University of Tokyo
, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8581, Japan
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Mitsuhiro Nakayama;
Mitsuhiro Nakayama
1Institute for Solid State Physics,
The University of Tokyo
, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8581, Japan
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Yukiaki Ishida;
Yukiaki Ishida
1Institute for Solid State Physics,
The University of Tokyo
, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8581, Japan
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Akiko Fukushima;
Akiko Fukushima
1Institute for Solid State Physics,
The University of Tokyo
, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8581, Japan
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Shuntaro Watanabe;
Shuntaro Watanabe
2Research Institute for Science and Technology,
Tokyo University of Science
, Chiba 278-8510, Japan
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Chuangtian Chen;
Chuangtian Chen
3Beijing Center for Crystal Research and Development,
Chinese Academy of Science
, Zhongguancun, Beijing 100190, China
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Fumio Komori;
Fumio Komori
1Institute for Solid State Physics,
The University of Tokyo
, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8581, Japan
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Shik Shin
Shik Shin
1Institute for Solid State Physics,
The University of Tokyo
, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8581, Japan
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a)
Electronic address: yaji@issp.u-tokyo.ac.jp
Rev. Sci. Instrum. 87, 053111 (2016)
Article history
Received:
December 21 2015
Accepted:
April 24 2016
Citation
Koichiro Yaji, Ayumi Harasawa, Kenta Kuroda, Sogen Toyohisa, Mitsuhiro Nakayama, Yukiaki Ishida, Akiko Fukushima, Shuntaro Watanabe, Chuangtian Chen, Fumio Komori, Shik Shin; High-resolution three-dimensional spin- and angle-resolved photoelectron spectrometer using vacuum ultraviolet laser light. Rev. Sci. Instrum. 1 May 2016; 87 (5): 053111. https://doi.org/10.1063/1.4948738
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