Photoemission angular distribution beyond the single wavevector description of photoelectron final states

Hiroaki Tanaka; Shota Okazaki; Yuto Fukushima; Kaishu Kawaguchi; Ayumi Harasawa; Takushi Iimori; Fumio Komori; Masashi Arita; Ryo Mori; Kenta Kuroda; Takao Sasagawa; Takeshi Kondo

doi:10.1103/PhysRevB.109.L241114

Letter

Photoemission angular distribution beyond the single wavevector description of photoelectron final states

Hiroaki Tanaka ^1,*, Shota Okazaki², Yuto Fukushima¹, Kaishu Kawaguchi¹, Ayumi Harasawa¹, Takushi Iimori¹, Fumio Komori ³, Masashi Arita⁴, Ryo Mori¹ et al.

Kenta Kuroda ^5,6,7,†, Takao Sasagawa^2,8,‡, and Takeshi Kondo^1,9,§

¹Institute for Solid State Physics, The University of Tokyo, Kashiwa, Chiba 277-8581, Japan
²Laboratory for Materials and Structures, Tokyo Institute of Technology, Yokohama, Kanagawa 226-8503, Japan
³Institute of Industrial Science, The University of Tokyo, Meguro-ku, Tokyo 153-8505, Japan
⁴Hiroshima Synchrotron Radiation Center, Hiroshima University, Higashi-hiroshima, Hiroshima 739-0046, Japan
⁵Graduate School of Advanced Science and Engineering, Hiroshima University, Higashi-hiroshima, Hiroshima 739-8526, Japan
⁶International Institute for Sustainability with Knotted Chiral Meta Matter (WPI-SKCM²), Hiroshima University, Higashi-hiroshima, Hiroshima 739-8526, Japan
⁷Research Institute for Semiconductor Engineering, Hiroshima University, Higashi-hiroshima, Hiroshima 739-8527, Japan
⁸Research Center for Autonomous Systems Materialogy, Tokyo Institute of Technology, Yokohama, Kanagawa 226-8503, Japan
⁹Trans-scale Quantum Science Institute, The University of Tokyo, Bunkyo-ku, Tokyo 113-0033, Japan

^*Contact author: hhiiro2022@gmail.com
^†Contact author: kuroken224@hiroshima-u.ac.jp
^‡Contact author: sasagawa@msl.titech.ac.jp
^§Contact author: kondo1215@issp.u-tokyo.ac.jp

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Phys. Rev. B 109, L241114 – Published 20 June, 2024

DOI: https://doi.org/10.1103/PhysRevB.109.L241114

Abstract

We develop a simulation procedure for angle-resolved photoemission spectroscopy (ARPES), where a photoelectron wave function is set to be an outgoing plane wave in a vacuum associated with the emitted photoelectron wave packet. ARPES measurements on the transition metal dichalcogenide $1 T − Ti S_{2}$ are performed, and our simulations exhibit good agreement with experiments. Analysis of our calculated final state wave functions quantitatively visualizes that they include various waves due to the boundary condition and the uneven crystal potential. These results show that a more detailed investigation of the photoelectron final states is necessary to fully explain the photon-energy- and light-polarization-dependent ARPES spectra.

Physical Review B

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Photoemission angular distribution beyond the single wavevector description of photoelectron final states

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Photoemission angular distribution beyond the single wavevector description of photoelectron final states

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