（2021年度以降の研究成果を掲載しています。）

• Youhei Yamaji, Shunsuke Tsuda, Koichiro Yaji. Photoemission microscope tomography for polycrystalline metals. Science and Technology of Advanced Materials: Methods. 6 [1] (2026) 2611609. DOI: 10.1080/27660400.2025.2611609
  
• Shingo Takezawa, Michele Riva, Florian Dörr, Micheal Schmid, Taisuke Sasaki, Takanobu Hiroto, Masato Kotsugi, Koichiro Yaji, Yuya Sakuraba, Naoka Nagamura. Initial Growth Process of Cu Thin Films on bcc-FeCo/MgO(100) via Molecular Beam Epitaxy. e-Journal of Surface Science and Nanotechnology. 24 [1] (2026) 2026-004, DOI: 10.1380/ejssnt.2026-004
• Yuta Nakayasu, Shu Sokabe, Naoka Nagamura, Chie Ooka, Tomoya Yamada, Kayoko Kobayashi, Masaru Watanabe. Supercritical CO 2 -Induced Quinone Confinement and Interfacial Polarization in Microporous Carbon Electrodes for Aqueous All-Organic Batteries. ACS Applied Materials & Interfaces. 18 [10] (2026) 14947-14959, DOI: 10.1021/acsami.5c21457
• Hayate Kunitsu, Iori Ishiguro, Natsuki Mitsuishi, Shunsuke Tsuda, Koichiro Yaji, Zehao Wang, Pengcheng Dai, Yoichi Yamakawa, Hiroshi Kontani, Takahiro Shimojima. Fermi Surface of Kagome Metal CsCr 3 Sb 5 Observed by Laser Photoemission Microscopy. Journal of the Physical Society of Japan. 95 [7] (2026) 073703, DOI: 10.7566/jpsj.95.073703
• Yoshihiro Fukushima, Satoru Ichinokura, Taisuke Sasaki, Toru Hirahara. Realization of a Bulk-Insulating Ferromagnetic Topological Crystalline Insulator and Its Multicarrier Surface Dirac-Cone Transport. Physical Review Letters. 136 [6] (2026) 066602, DOI: 10.1103/wrpq-17h9
• 矢治 光一郎. 実空間・運動量空間顕微光電子分光の開発. 表面と真空. 69 [7] (2026) 358-363 10.1380/vss.69.358

• Chandan De, Keisuke Fukutani, Junho Seo, Roland Stania, Koichiro Yaji, Kenta Kuroda, Kenya Shimada, Jun Sung Kim, Han Woong Yeom, Sang-Wook Cheong. Multiple magnetic transitions, anomalous Hall effect, and tunable surface states in Mn(Bi1−xSbx)4Te7. Physical Review B. 112 [8] (2025) 085151 10.1103/7swz-xkrt
• Thang Dinh Phan, Shunsuke Tsuda, Riku Goto, Naoka Nagamura, Ovidiu Cretu, Koji Kimoto, Koichiro Yaji. Structural and electronic properties of transferred graphene on yttrium iron garnet (111). Journal of Applied Physics. 138 [6] (2025) 064301 10.1063/5.0283562 Open Access
• Prabhat Kumar, Shunsuke Tsuda, Koichiro Yaji, Shinji Isogami. Origin of two-dimensional MXene/ferromagnetic interface evaluated by angle-dependent hard X-ray photoemission spectroscopy. Science and Technology of Advanced Materials. 26 [1] (2025) 2551484 10.1080/14686996.2025.2551484
• Yusuke Kozuka, Shunsuke Tsuda, Thang Dinh Phan, Koichiro Yaji, Jun Uzuhashi, Tadakatsu Ohkubo, Takanobu Hiroto, Takayuki Makino, Joseph Falson, Atsushi Tsukazaki, Masashi Kawasaki. Structural, optical, and electronic properties of Mg Zn1-O (0 ≤ x ≤ 0.38) films pseudomorphically grown on Zn-polar ZnO substrates. Materials Today Quantum. 6 (2025) 100036 10.1016/j.mtquan.2025.100036
• Ryo Toyama, Shunsuke Tsuda, Yuma Iwasaki, Thang Dinh Phan, Susumu Yamamoto, Hiroyuki Yamane, Koichiro Yaji, Yuya Sakuraba. High-throughput evaluation of half-metallicity of Co 2 MnSi Heusler alloys using composition-spread films and spin-integrated hard X-ray photoelectron spectroscopy. Science and Technology of Advanced Materials. 26 [1] (2025) 2439781 10.1080/14686996.2024.2439781

• Tarojiro Matsumura, Naoka Nagamura, Shotaro Akaho, Kenji Nagata, Yasunobu Ando. Maximum a posteriori estimation for high-throughput peak fitting in X-ray photoelectron spectroscopy. Science and Technology of Advanced Materials: Methods. 4 [1] (2024) 2373046 10.1080/27660400.2024.2373046 Open Access
• YAJI, Koichiro, HATTORI, Yuya, YOSHIZAWA, Shunsuke, TSUDA, Shunsuke, KOMORI, Fumio, YAMAJI, Youhei, Yuto Fukushima, Kaishu Kawaguchi, Takeshi Kondo, Yuki Tokumoto, Keiichi Edagawa, TERASHIMA, Taichi. Visualization of spin-polarized surface resonances in Pb-based ternary topological insulators. Scientific Reports. 14 (2024) 25868-1-25868-8
• 永村 直佳, 安藤 康伸. 機械学習高速自動スペクトル解析ソフト“EMPeaks”について. 表面と真空. 67 [10] (2024) 500-505 10.1380/vss.67.500
• Koichiro Yaji, Kenta Kuroda, Shunsuke Tsuda, Fumio Komori. Spin polarization of photoelectrons emitted from spin-orbit coupled surface states of Pb/Ge(111). Microscopy. 73 [5] (2024) 439-445 10.1093/jmicro/dfae021
• Tomonori Nakamura, Yitao Chen, Ryohei Nemoto, Wenxuan Qian, Yuto Fukushima, Kaishu Kawaguchi, Ryo Mori, Takeshi Kondo, Youhei Yamaji, Shunsuke Tsuda, Koichiro Yaji, Takashi Uchihashi. Moiré superlattices of antimonene on a Bi(111) substrate with van Hove singularity and Rashba-type spin polarization. Communications Materials. 5 [1] (2024) 167 10.1038/s43246-024-00615-z
• Yuto Fukushima, Kaishu Kawaguchi, Kenta Kuroda, Masayuki Ochi, Motoaki Hirayama, Ryo Mori, Hiroaki Tanaka, Ayumi Harasawa, Takushi Iimori, Zhigang Zhao, Shuntaro Tani, Koichiro Yaji, Shik Shin, Fumio Komori, Yohei Kobayashi, Takeshi Kondo. Spin-polarized saddle points in the topological surface states of elemental bismuth revealed by pump-probe spin- and angle-resolved photoemission spectroscopy. Physical Review B. 110 [4] (2024) L041401 10.1103/physrevb.110.l041401
• Koichiro Yaji, Shunsuke Tsuda. Visualization of spin-polarized electronic states by imaging-type spin-resolved photoemission microscopy. Science and Technology of Advanced Materials: Methods. 4 [1] (2024) 2328206 10.1080/27660400.2024.2328206
• Shunsuke Tsuda, Koichiro Yaji. Time-of-Flight-type Photoelectron Emission Microscopy with a 10.9-eV Laser. e-Journal of Surface Science and Nanotechnology. 22 [2] (2024) 2024-005 10.1380/ejssnt.2024-005

• Shunsuke Tsuda, Asako Yoshinari, Shingo Takezawa, Kenta Ohishi, Naoka Nagamura, Wenxiong Zhang, Yutaka Iwasaki, Yoshiki Takagiwa. Effect of carrier doping on the electronic states of earth-abundant Fe–Al–Si thermoelectric materials. Materials Research Express. 10 [5] (2023) 055506 10.1088/2053-1591/acd438
• 永村 直佳. 放射光でナノの世界を照らすオペランド分光イメージング. フロンティア. 5 [3] (2023) 196-201
• Tarojiro Matsumura, Naoka Nagamura, Shotaro Akaho, Kenji Nagata, Yasunobu Ando. High-throughput XPS spectrum modeling with autonomous background subtraction for 3d5/2 peak mapping of SnS. Science and Technology of Advanced Materials: Methods. 3 [1] (2023) 10.1080/27660400.2022.2159753
• Wenxiong Zhang, Eiji Hosono, Daisuke Asakura, Shingo Tanaka, Masaki Kobayashi, Naoka Nagamura, Masaharu Oshima, Jun Miyawaki, Hisao Kiuchi, Yoshihisa Harada. Facet-dependent electrochemical performance and electronic structure of LiCoO2 polyhedral particles revealed by microscopic resonant X-ray photoelectron spectroscopy. CrystEngComm. 25 [2] (2023) 183-188 10.1039/d2ce01185a
• Koichiro Yaji, Shunsuke Tsuda. Development of a Photoemission Microscopy Apparatus Using a Vacuum Ultraviolet Laser. e-Journal of Surface Science and Nanotechnology. 22 [1] (2023) 2023-066 10.1380/ejssnt.2023-066
• Takahiro Kobayashi, Yuichiro Toichi, Koichiro Yaji, Yoshitaka Nakata, Yuchi Yaoita, Mutsuki Iwaoka, Mariko Koga, Yituo Zhang, Jun Fujii, Shimpei Ono, Yasmine Sassa, Yasuo Yoshida, Yukio Hasegawa, Fumio Komori, Shik Shin, Satoru Ichinokura, Ryota Akiyama, Shuji Hasegawa, Tatsuya Shishidou, Michael Weinert, Kazuyuki Sakamoto. Revealing the Hidden Spin-Polarized Bands in a Superconducting Tl Bilayer Crystal. Nano Letters. 23 [16] (2023) 7675-7682 10.1021/acs.nanolett.3c02387
• Kaishu Kawaguchi, Kenta Kuroda, Z. Zhao, S. Tani, A. Harasawa, Y. Fukushima, H. Tanaka, R. Noguchi, T. Iimori, K. Yaji, M. Fujisawa, S. Shin, F. Komori, Y. Kobayashi, Takeshi Kondo. Time-, spin-, and angle-resolved photoemission spectroscopy with a 1-MHz 10.7-eV pulse laser. Review of Scientific Instruments. 94 [8] (2023) 10.1063/5.0151859
• Rena Moue, Hiroto Yamazaki, Tatsuya Kitazawa, Koichiro Yaji, Hiroshi Yaguchi, Kenta Kuroda, Takeshi Kondo, Ayumi Harasawa, Takashi Iwahashi, Yukio Ouchi, Shik Shin, Kaname Kanai. Topological Surface State of Bi 2 Se 3 Modified by Physisorption of n ‐Alkane. ChemNanoMat. 9 [3] (2023) 10.1002/cnma.202200538

• Koichiro Yaji, Shunsuke Tsuda. Development of a Photoemission Microscopy Apparatus Using a Vacuum Ultraviolet Laser. e-Journal of Surface Science and Nanotechnology. 22 [1] 46-52. 2023. Open Access
• 永村 直佳. 放射光でナノの世界を照らすオペランド分光イメージング. フロンティア. 5 [3] 196-201. 2023. Open Access
• Tarojiro Matsumura, Naoka Nagamura, Kenji Nagata. High-throughput XPS spectrum modeling with autonomous background subtraction for 3 d 5/2 peak mapping of SnS. Science and Technology of Advanced Materials: Methods. 3 [1] 2159753. 2023.
• Takahiro Kobayashi, Koichiro Yaji. Revealing the Hidden Spin-Polarized Bands in a Superconducting Tl Bilayer Crystal. Nano Letters. 23 [16] 7675-7682. 2023.
• Kaishu Kawaguchi, K. Yaji. Time-, spin-, and angle-resolved photoemission spectroscopy with a 1-MHz 10.7-eV pulse laser. Review of Scientific Instruments. 94 [8] 083902. 2023.
• Shunsuke Tsuda, Asako Yoshinari, Shingo Takezawa, Kenta Ohishi, Naoka Nagamura, Wenxiong Zhang, Yutaka Iwasaki, Yoshiki Takagiwa. Effect of carrier doping on the electronic states of earth-abundant Fe–Al–Si thermoelectric materials. Materials Research Express. 10 [5] 055506. 2023.
• Rena Moue, Koichiro Yaji. Topological Surface State of Bi 2 Se 3 Modified by Physisorption of n ‐Alkane. ChemNanoMat. 9 [3] e202200538. 2023.
• Wenxiong Zhang, Naoka Nagamura. Facet-dependent electrochemical performance and electronic structure of LiCoO2 polyhedral particles revealed by microscopic resonant X-ray photoelectron spectroscopy. CrystEngComm. 25 [2] 183-188. 2023.

• Asako Yoshinari, Yuma Iwasaki, Masato Kotsugi, Shunsuke Sato, Naoka Nagamura. Skill-Agnostic analysis of reflection high-energy electron diffraction patterns for Si(111) surface superstructures using machine learning. Science and Technology of Advanced Materials: Methods. 2 [1] (2022) 162-174 10.1080/27660400.2022.2079942
• Naoka Nagamura, Shun Konno, Morihiro Matsumoto, Wenxiong Zhang, Masato Kotsugi, Masaharu Oshima, Ryo Nouchi. Photoelectron spectromicroscopy analysis of graphene during gate-controlled photo-oxidation process. Nano Express. 3 [4] (2022) 044003 10.1088/2632-959x/aca0af
• De-Yang Wang, Qi Jiang, Kenta Kuroda, Kaishu Kawaguchi, Ayumi Harasawa, Koichiro Yaji, Arthur Ernst, Hao-Ji Qian, Wen-Jing Liu, He-Ming Zha, Zhi-Cheng Jiang, Ni Ma, Hong-Ping Mei, Ang Li, Takeshi Kondo, Shan Qiao, Mao Ye. Coexistence of Strong and Weak Topological Orders in a Quasi-One-Dimensional Material. Physical Review Letters. 129 [14] (2022) 146401 10.1103/physrevlett.129.146401
• Shi-Long Wu, Koichiro Yaji, Yuichi Ota, Ayumi Harasawa, Shik Shin, Takehito Imai, Koji Miyamoto, Masanori Nagao, Satoshi Watauchi, Isao Tanaka, Xiaoping Ma, Huaixin Yang, Yongqing Cai, Lin Zhao, Xingjiang Zhou, Taichi Okuda. Systematic study of electronic states of Ln(O,F)BiS2 by spin- and angle-resolved photoemission spectroscopy. Physical Review B. 106 [10] (2022) 104511 10.1103/physrevb.106.104511
• Kazuyuki Sakamoto, Takahiro Kobayashi, Koichiro Yaji, Tatsuya Shishidou, Markus Donath. Spin-polarized electrons in atomic layer materials formed on solid surfaces. Progress in Surface Science. 97 [3] (2022) 100665 10.1016/j.progsurf.2022.100665
• Hirokazu Fujiwara, Kensei Terashima, Junya Otsuki, Nayuta Takemori, Harald O. Jeschke, Takanori Wakita, Yuko Yano, Wataru Hosoda, Noriyuki Kataoka, Atsushi Teruya, Masashi Kakihana, Masato Hedo, Takao Nakama, Yoshichika Ōnuki, Koichiro Yaji, Ayumi Harasawa, Kenta Kuroda, Shik Shin, Koji Horiba, Hiroshi Kumigashira, Yuji Muraoka, Takayoshi Yokoya. Anomalously large spin-dependent electron correlation in the nearly half-metallic ferromagnet CoS2. Physical Review B. 106 [8] (2022) 085114 10.1103/physrevb.106.085114
• M. Kobayashi, N. H. D. Khang, T. Takeda, K. Araki, R. Okano, M. Suzuki, K. Kuroda, K. Yaji, K. Sugawara, S. Souma, K. Nakayama, K. Yamauchi, M. Kitamura, K. Horiba, A. Fujimori, T. Sato, S. Shin, M. Tanaka, P. N. Hai. Rhombic Fermi surfaces in a ferromagnetic MnGa thin film with perpendicular magnetic anisotropy. Physical Review Materials. 6 [7] (2022) 074403 10.1103/physrevmaterials.6.074403
• Takuto Nakamura, Yoshiyuki Ohtsubo, Ayumi Harasawa, Koichiro Yaji, Shik Shin, Fumio Komori, Shin-ichi Kimura. Fluctuating spin-orbital texture of Rashba-split surface states in real and reciprocal space. Physical Review B. 105 [23] (2022) 235141 10.1103/physrevb.105.235141
• Kenta Kuroda, Koichiro Yaji, Ryo Noguchi, Ayumi Harasawa, Shik Shin, Takeshi Kondo, Fumio Komori. Visualization of optical polarization transfer to photoelectron spin vector emitted from a spin-orbit coupled surface state. Physical Review B. 105 [12] (2022) 10.1103/physrevb.105.l121106
• Yuxuan Wan, Lihai Wang, Kenta Kuroda, Peng Zhang, Keisuke Koshiishi, Masahiro Suzuki, Jaewook Kim, Ryo Noguchi, Cédric Bareille, Koichiro Yaji, Ayumi Harasawa, Shik Shin, Sang-Wook Cheong, Atsushi Fujimori, Takeshi Kondo. Selective observation of surface and bulk bands in polar WTe2 by laser-based spin- and angle-resolved photoemission spectroscopy. Physical Review B. 105 [8] (2022) 10.1103/physrevb.105.085421

• 矢治 光一郎. 偏光励起スピン角度分解光電子分光で解明するスピン軌道結合電子状態. 表面と真空. 64 [6] (2021) 275-280 10.1380/vss.64.275
• 内橋 隆, 吉澤 俊介, 矢治 光一郎, 小林 宇宏, 坂本 一之. 表面原子層超伝導体におけるスピン分裂と動的なスピン運動量ロッキング効果. 固体物理. (2021) 723-733
• Peng Zhang, Ryo Noguchi, Kenta Kuroda, Chun Lin, Kaishu Kawaguchi, Koichiro Yaji, Ayumi Harasawa, Mikk Lippmaa, Simin Nie, Hongming Weng, V. Kandyba, A. Giampietri, A. Barinov, Qiang Li, G. D. Gu, Shik Shin, Takeshi Kondo. Observation and control of the weak topological insulator state in ZrTe5. Nature Communications. 12 [1] (2021) 10.1038/s41467-020-20564-8
• Shunsuke Yoshizawa, Takahiro Kobayashi, Yoshitaka Nakata, Koichiro Yaji, Kenta Yokota, Fumio Komori, Shik Shin, Kazuyuki Sakamoto, Takashi Uchihashi. Atomic-layer Rashba-type superconductor protected by dynamic spin-momentum locking. Nature Communications. 12 [1] (2021) 10.1038/s41467-021-21642-1
• Ryo Noguchi, Kenta Kuroda, Mitsuaki Kawamura, Koichiro Yaji, Ayumi Harasawa, Takushi Iimori, Shik Shin, Fumio Komori, Taisuke Ozaki, Takeshi Kondo. Scaling law for Rashba-type spin splitting in quantum-well films. Physical Review B. 104 [18] (2021) 10.1103/physrevb.104.l180409
• Chun Lin, Masayuki Ochi, Ryo Noguchi, Kenta Kuroda, Masahito Sakoda, Atsushi Nomura, Masakatsu Tsubota, Peng Zhang, Cedric Bareille, Kifu Kurokawa, Yosuke Arai, Kaishu Kawaguchi, Hiroaki Tanaka, Koichiro Yaji, Ayumi Harasawa, Makoto Hashimoto, Donghui Lu, Shik Shin, Ryotaro Arita, Satoshi Tanda, Takeshi Kondo. Visualization of the strain-induced topological phase transition in a quasi-one-dimensional superconductor TaSe3. Nature Materials. 20 [8] (2021) 1093-1099 10.1038/s41563-021-01004-4
• Hirotaka Mizushima, Harunobu Koike, Kenta Kuroda, Koichiro Yaji, Ayumi Harasawa, Yukiaki Ishida, Mitsuhiro Nakayama, Kazuhiko Mase, Kozo Mukai, Tatsuya Kitazawa, Takeshi Kondo, Jun Yoshinobu, Shik Shin, Kaname Kanai. Structure and electronic structure of van der Waals interfaces at a Au(1 1 1) surface covered with a well-ordered molecular layer of n-alkanes. Applied Surface Science. 535 (2021) 147673 10.1016/j.apsusc.2020.147673
• 永村 直佳, 松村 太郎次郎, 永田 賢二, 赤穂 昭太郎, 安藤 康伸. 計測インフォマティクスを応用したX線顕微分光によるナノ表界面分析. 表面と真空. (2021) 382-389 10.1380/vss.64.382
• Mitsuhiro Okada, Naoka Nagamura, Tarojiro Matsumura, Yasunobu Ando, Anh Khoa Augustin Lu, Naoya Okada, Wen-Hsin Chang, Takeshi Nakanishi, Tetsuo Shimizu, Toshitaka Kubo, Toshifumi Irisawa, Takatoshi Yamada. Growth of MoS2–Nb-doped MoS2 lateral homojunctions: A monolayer p–n diode by substitutional doping. APL Materials. 9 [12] (2021) 121115 10.1063/5.0070333
• Tarojiro Matsumura, Naoka Nagamura, Shotaro Akaho, Kenji Nagata, Yasunobu Ando. Spectrum adapted expectation-conditional maximization algorithm for extending high–throughput peak separation method in XPS analysis. Science and Technology of Advanced Materials: Methods. 1 [1] (2021) 45-55 10.1080/27660400.2021.1899449